Cleanup for GCC-4.x
diff --git a/board/amcc/bubinga/bubinga.c b/board/amcc/bubinga/bubinga.c
index b4e9349..fe6ce8a 100644
--- a/board/amcc/bubinga/bubinga.c
+++ b/board/amcc/bubinga/bubinga.c
@@ -42,7 +42,7 @@
  */
 int checkboard(void)
 {
-	unsigned char *s = getenv("serial#");
+	char *s = getenv("serial#");
 
 	puts("Board: Bubinga - AMCC PPC405EP Evaluation Board");