Correct OFSTRUCT declaration.

include/winbase.h

diff --git a/include/winbase.h b/include/winbase.h
index f7041b0..c84b232 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -139,7 +139,7 @@
     WORD nErrCode;
     WORD Reserved1;
     WORD Reserved2;
-    BYTE szPathName[OFS_MAXPATHNAME];
+    CHAR szPathName[OFS_MAXPATHNAME];
 } OFSTRUCT, *POFSTRUCT, *LPOFSTRUCT;
 
 #define OF_READ               0x0000