Merged revision(s) 22708 from trunk/OpenMPT:

[Fix] build: Autotools: MinGW: MinGW does not define _UNICODE in its CRT headers when UNICODE is defined, like Microsoft does. #define _UNICODE manually when passing -municode.
........


git-svn-id: https://source.openmpt.org/svn/openmpt/branches/OpenMPT-1.31@22710 56274372-70c3-4bfc-bfc3-4c3a0b034d27

build/autotools/configure.ac

@@ -106,7 +106,7 @@ AS_CASE([$host_os],
   LIBOPENMPT_LIBS_PRIVATE_WIN32=
   LIBOPENMPTTEST_WIN32_LIBS="-lole32 -lrpcrt4"
   OPENMPT123_WIN32_LIBS=-lwinmm
-  WIN32_CPPFLAGS="-DNOMINMAX"
+  WIN32_CPPFLAGS="-D_UNICODE -DNOMINMAX"
   WIN32_CXXFLAGS="-municode -mthreads"
   WIN32_CFLAGS="-municode -mthreads"
   WIN32_CONSOLE_CXXFLAGS=-mconsole