Cleanup for GCC-4.x
diff --git a/board/esd/ar405/ar405.c b/board/esd/ar405/ar405.c
index 14b0e42..3aac3c6 100644
--- a/board/esd/ar405/ar405.c
+++ b/board/esd/ar405/ar405.c
@@ -155,7 +155,7 @@
 
 	int index;
 	int len;
-	unsigned char str[64];
+	char str[64];
 	int i = getenv_r ("serial#", str, sizeof (str));
 	const unsigned char *fpga;