Fix sign of sscanf format specifiers

All values read by sscanf are unsigned, so replace %d by %u.

This signed / unsigned mismatch was detected by splint.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>

cursor.c

@@ -15,7 +15,8 @@ static QEMUCursor *cursor_parse_xpm(const char *xpm[])
     uint8_t idx;
 
     /* parse header line: width, height, #colors, #chars */
-    if (sscanf(xpm[line], "%d %d %d %d", &width, &height, &colors, &chars) != 4) {
+    if (sscanf(xpm[line], "%u %u %u %u",
+               &width, &height, &colors, &chars) != 4) {
         fprintf(stderr, "%s: header parse error: \"%s\"\n",
                 __FUNCTION__, xpm[line]);
         return NULL;