Blame SOURCES/wireshark-1.10.14-CVE-2015-6243.patch

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diff --git a/epan/packet.c b/epan/packet.c
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index 1ad0320..179011e 100644
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--- a/epan/packet.c
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+++ b/epan/packet.c
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@@ -1266,6 +1266,7 @@ dissector_get_string_handle(dissector_table_t sub_dissectors,
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 {
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 	dtbl_entry_t *dtbl_entry;
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+	if (!string) return 0;
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 	dtbl_entry = find_string_dtbl_entry(sub_dissectors, string);
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 	if (dtbl_entry != NULL)
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 		return dtbl_entry->current;