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diff -up openchange-openchange-2.3-VULCAN/ndr_mapi.c.samba-4.12 openchange-openchange-2.3-VULCAN/ndr_mapi.c
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--- openchange-openchange-2.3-VULCAN/ndr_mapi.c.samba-4.12	2020-01-27 11:04:07.136870938 +0100
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+++ openchange-openchange-2.3-VULCAN/ndr_mapi.c	2020-01-27 11:12:29.978863985 +0100
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@@ -2151,7 +2151,11 @@ enum ndr_err_code ndr_push_RestrictionVa
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 		uint32_t _flags_save_STRUCT = ndr->flags;
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 		ndr_set_flags(&ndr->flags, LIBNDR_FLAG_NOALIGN);
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 		if (ndr_flags & NDR_SCALARS) {
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-			int level = ndr_push_get_switch_value(ndr, r);
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+			uint32_t level = 0;
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+
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+			if (!NDR_ERR_CODE_IS_SUCCESS(ndr_push_steal_switch_value(ndr, r, &level)))
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+				level = 0;
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+
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 			switch (level) {
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 				case 0x0: {
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 					break; }
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@@ -2165,7 +2169,9 @@ enum ndr_err_code ndr_push_RestrictionVa
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 			}
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 		}
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 		if (ndr_flags & NDR_BUFFERS) {
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-			int level = ndr_push_get_switch_value(ndr, r);
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+			uint32_t level;
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+			if (!NDR_ERR_CODE_IS_SUCCESS(ndr_push_steal_switch_value(ndr, r, &level)))
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+				level = 0;
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 			switch (level) {
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 				case 0x0:
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 				break;
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@@ -2187,9 +2193,10 @@ enum ndr_err_code ndr_push_RestrictionVa
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 enum ndr_err_code  ndr_pull_RestrictionVariable(struct ndr_pull *ndr, int ndr_flags, union RestrictionVariable *r)
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 {
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-	int level;
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+	uint32_t level;
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 	TALLOC_CTX *_mem_save_res_0;
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-	level = ndr_pull_get_switch_value(ndr, r);
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+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_pull_steal_switch_value(ndr, r, &level)))
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+		level = 0;
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 	{
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 		uint32_t _flags_save_STRUCT = ndr->flags;
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 		ndr_set_flags(&ndr->flags, LIBNDR_FLAG_NOALIGN);
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@@ -2237,8 +2244,8 @@ enum ndr_err_code  ndr_pull_RestrictionV
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 _PUBLIC_ void ndr_print_RestrictionVariable(struct ndr_print *ndr, const char *name, const union RestrictionVariable *r)
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 {
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-	int level;
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-	level = ndr_print_get_switch_value(ndr, r);
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+	uint32_t level;
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+	level = ndr_print_steal_switch_value(ndr, r);
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 	ndr_print_union(ndr, name, level, "RestrictionVariable");
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 	switch (level) {
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 		case 0x0: