Workaround for tlhelp32.h: place the missing header file in outinc

ms/mingw32.bat

@@ -76,6 +76,8 @@ rem Create files -- this can be skipped if using the GNU file utilities
 make -f ms/mingw32f.mak
 echo You can ignore the error messages above
 
+copy ms\tlhelp32.h outinc
+
 echo Building the libraries
 make -f ms/mingw32a.mak
 if errorlevel 1 goto end