Correct return type of SHFileOperationA/W.

diff --git a/include/shellapi.h b/include/shellapi.h
index 2b523fa..ae229e9 100644
--- a/include/shellapi.h
+++ b/include/shellapi.h
@@ -209,8 +209,8 @@
 #define  SHFILEOPSTRUCT WINELIB_NAME_AW(SHFILEOPSTRUCT)
 #define  LPSHFILEOPSTRUCT WINELIB_NAME_AW(LPSHFILEOPSTRUCT)
 
-DWORD	WINAPI SHFileOperationA (LPSHFILEOPSTRUCTA lpFileOp);
-DWORD	WINAPI SHFileOperationW (LPSHFILEOPSTRUCTW lpFileOp);
+int	WINAPI SHFileOperationA (LPSHFILEOPSTRUCTA lpFileOp);
+int	WINAPI SHFileOperationW (LPSHFILEOPSTRUCTW lpFileOp);
 #define  SHFileOperation WINELIB_NAME_AW(SHFileOperation)
 
 /******************************************