msvc: fix the declaration of the _REPARSE_DATA_BUFFER structure

GCC and MSVC disagree about using the GCC extension _ANONYMOUS_UNION.
Simply skip that offending keyword when compiling with MSVC.

Signed-off-by: Philip Oakley <[email protected]>
Signed-off-by: Johannes Schindelin <[email protected]>

Author: Philip Oakley

compat/mingw.c

@@ -2295,7 +2295,10 @@ typedef struct _REPARSE_DATA_BUFFER {
 	DWORD  ReparseTag;
 	WORD   ReparseDataLength;
 	WORD   Reserved;
-	_ANONYMOUS_UNION union {
+#ifndef _MSC_VER
+	_ANONYMOUS_UNION
+#endif
+	union {
 		struct {
 			WORD   SubstituteNameOffset;
 			WORD   SubstituteNameLength;