[PATCH 1/1] winex11: Fix chinese path failure of conversion.

[Haoyang Chen]

From: Haoyang Chen

Chinese word is negative, the high 4 bits are signed, right shift
will remain signed，high 4 bits is filled by 1.
Finally it will exceed the boundaries of hax_table.
---
 dlls/winex11.drv/clipboard.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/winex11.drv/clipboard.c b/dlls/winex11.drv/clipboard.c
index 087e0aab79b..4c9672f216f 100644
--- a/dlls/winex11.drv/clipboard.c
+++ b/dlls/winex11.drv/clipboard.c
@@ -1622,7 +1622,7 @@ static BOOL export_hdrop( Display *display, Window win, Atom prop, Atom target,
         {
             static const char hex_table[] = "0123456789abcdef";
             textUriList[next++] = '%';
-            textUriList[next++] = hex_table[unixFilename[u] >> 4];
+            textUriList[next++] = hex_table[(unsigned char)unixFilename[u] >> 4];
             textUriList[next++] = hex_table[unixFilename[u] & 0xf];
         }
         textUriList[next++] = '\r';