mingw/w32api uses a different header guard than MSVC for <basestd.h>

Bug #134113 r=pavlov sr=tor

jpeg/MOZCHANGES

@@ -0,0 +1,8 @@
+
+Changes made to pristine jpeg source by mozilla.org developers.
+
+2003/03/14  -- mingw bustage fix. w32api uses different header guard define
+               for <basestd.h> than msvc.
+
+????/??/??  -- Lots of undocumented changes. :(
+

jpeg/jmorecfg.h

@@ -177,9 +177,11 @@ typedef short INT16;
 
 #ifndef XMD_H			/* X11/xmd.h correctly defines INT32 */
 #ifndef _BASETSD_H_		/* basetsd.h correctly defines INT32 */
+#ifndef _BASETSD_H
 typedef long INT32;
 #endif
 #endif
+#endif
 
 /* Datatype used for image dimensions.  The JPEG standard only supports
  * images up to 64K*64K due to 16-bit fields in SOF markers.  Therefore