Cleanup for GCC-4.x
diff --git a/board/siemens/SCM/scm.c b/board/siemens/SCM/scm.c
index d832edf..d20688d 100644
--- a/board/siemens/SCM/scm.c
+++ b/board/siemens/SCM/scm.c
@@ -206,7 +206,7 @@
  */
 int checkboard (void)
 {
-	unsigned char str[64];
+	char str[64];
 	int i = getenv_r ("serial#", str, sizeof (str));
 
 	puts ("Board: ");