Work around compilation errors with mingw-w64 and --enable-debug

shell/inc/internal/utilities.hxx

@@ -44,8 +44,31 @@
 
 #include <string>
 #define STRSAFE_NO_DEPRECATE
+#ifdef __MINGW32__
+
+// Work around lack of strsafe library in mingw-w64, do let their
+// strsafe.h provide inlines of StringCchVPrintfA etc, avoid linking
+// errors in a debug build.
+#ifdef __CRT__NO_INLINE
+#undef __CRT__NO_INLINE
+#define DID_UNDEFINE__CRT__NO_INLINE
+#endif
+
+extern "C" {
+
+#endif
+
 #include <strsafe.h>
 
+#ifdef __MINGW32__
+}
+
+#ifdef DID_UNDEFINE__CRT__NO_INLINE
+#define __CRT__NO_INLINE
+#endif
+
+#endif
+
 //---------------------------------
 /** Convert a string to a wstring
     using CP_ACP