Use COMPILER_MINGW define rather than __MINGW64__

This is necessary to build with win32 target using mingw-w64 version
on Fedora 19

diff --git a/libs/pbd/pbd/localtime_r.h b/libs/pbd/pbd/localtime_r.h
index 532bb3ed12349dc9e3b99273cb572a4b1f3624af..2a4502481d8b139f8f77ea863c0f6f9978e581be 100644 (file)
--- a/libs/pbd/pbd/localtime_r.h
+++ b/libs/pbd/pbd/localtime_r.h
@@ -7,7 +7,7 @@
 #define localtime_r( _clock, _result ) \
        ( *(_result) = *localtime( (_clock) ), (_result) )
 
-#elif defined __MINGW64__
+#elif defined COMPILER_MINGW
 
 #  ifdef localtime_r
 #  undef localtime_r