[PATCH] kbuild: signed char fixes for scripts

This time I did not break anything... and they shut up gcc4 ;)

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index d3d2e53..9be41a9f 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -207,9 +207,9 @@
 		 * move then they may get dropped in pass 2, which breaks the
 		 * kallsyms rules.
 		 */
-		if ((s->addr == _etext && strcmp(s->sym + offset, "_etext")) ||
-		    (s->addr == _einittext && strcmp(s->sym + offset, "_einittext")) ||
-		    (s->addr == _eextratext && strcmp(s->sym + offset, "_eextratext")))
+		if ((s->addr == _etext && strcmp((char*)s->sym + offset, "_etext")) ||
+		    (s->addr == _einittext && strcmp((char*)s->sym + offset, "_einittext")) ||
+		    (s->addr == _eextratext && strcmp((char*)s->sym + offset, "_eextratext")))
 			return 0;
 	}