[PATCH] radeonfb: Fix static array overrun

radeonfb_parse_monitor_layout() will produce an array overrun if passed with a
substring of length higher than 4 (ie, "XXXXX,YYYYYY").

Coverity Bug 494

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/video/aty/radeon_monitor.c

@@ -396,6 +396,10 @@ static int __devinit radeon_parse_monitor_layout(struct radeonfb_info *rinfo,
 				s1[i] = *s;
 			i++;
 		}
+
+		if (i > 4)
+			i = 4;
+
 	} while (*s++);
 	if (second)
 		s2[i] = 0;