msvcrt: Don't include mbstring.h to avoid conflicts with system headers.
diff --git a/dlls/msvcrt/mbcs.c b/dlls/msvcrt/mbcs.c
index 258751e..3643fda 100644
--- a/dlls/msvcrt/mbcs.c
+++ b/dlls/msvcrt/mbcs.c
@@ -27,7 +27,6 @@
 #include "wine/unicode.h"
 #include "wine/debug.h"
 #include "msvcrt/mbctype.h"
-#include "msvcrt/mbstring.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
 
@@ -332,6 +331,14 @@
 }
 
 /*********************************************************************
+ *		_mbclen(MSVCRT.@)
+ */
+unsigned int CDECL _mbclen(const unsigned char* str)
+{
+  return _ismbblead(*str) ? 2 : 1;
+}
+
+/*********************************************************************
  *		_mbsinc(MSVCRT.@)
  */
 unsigned char* CDECL _mbsinc(const unsigned char* str)
@@ -363,14 +370,6 @@
 }
 
 /*********************************************************************
- *		_mbclen(MSVCRT.@)
- */
-unsigned int CDECL _mbclen(const unsigned char* str)
-{
-  return _ismbblead(*str) ? 2 : 1;
-}
-
-/*********************************************************************
  *		_mbslen(MSVCRT.@)
  */
 MSVCRT_size_t CDECL _mbslen(const unsigned char* str)