appveyor: set __USE_MINGW_ANSI_STDIO to 1, rather than just define it
@@ -15,7 +15,7 @@ environment:
- COMPILER: mingw
GENERATOR: "MSYS Makefiles"
BUILD_FLAGS: -j2
- CPPFLAGS: -D__USE_MINGW_ANSI_STDIO
+ CPPFLAGS: -D__USE_MINGW_ANSI_STDIO=1
- COMPILER: msvc
GENERATOR: "Visual Studio 14 2015 Win64"
CFLAGS: /MP
