Blame SOURCES/build-missing-xlocale-h.patch

b56797
diff -up thunderbird-52.3.0/mozilla/intl/icu/source/i18n/digitlst.cpp.xlocale thunderbird-52.3.0/mozilla/intl/icu/source/i18n/digitlst.cpp
b56797
--- thunderbird-52.3.0/mozilla/intl/icu/source/i18n/digitlst.cpp.xlocale	2017-08-24 14:42:48.634084293 +0200
b56797
+++ thunderbird-52.3.0/mozilla/intl/icu/source/i18n/digitlst.cpp	2017-08-24 14:42:50.534084676 +0200
b56797
@@ -64,7 +64,7 @@
b56797
 # if U_PLATFORM_USES_ONLY_WIN32_API || U_PLATFORM == U_PF_CYGWIN
b56797
 #   include <locale.h>
b56797
 # else
b56797
-#   include <xlocale.h>
b56797
+#   include <locale.h>
b56797
 # endif
b56797
 #endif
b56797