Cleanup for GCC-4.x
diff --git a/board/esd/pmc405/pmc405.c b/board/esd/pmc405/pmc405.c
index a72547d..33b5f77 100644
--- a/board/esd/pmc405/pmc405.c
+++ b/board/esd/pmc405/pmc405.c
@@ -107,7 +107,7 @@
 
 int checkboard (void)
 {
-	unsigned char str[64];
+	char str[64];
 	int i = getenv_r ("serial#", str, sizeof(str));
 
 	puts ("Board: ");