cuefile: include compat/msvc.h for snprintf

MSVC before 2015 has no snprintf; compat/msvc.h maps it to the
c99_snprintf_retro__ implementation in compat_snprintf.c.

cuefile.c

@@ -4,6 +4,7 @@
 #include <string.h>
 
 #include <libretro.h>
+#include <compat/msvc.h>
 #include <compat/strl.h>
 #include <streams/file_stream.h>