hush: Fix printf debug macro in hush.c so that it usable in U-Boot

This patch changes the debug_printf() marco for U-Boot in hush.c and
moves the definition of DEBUG_SHELL to a place that is actually compiled
under U-Boot.

Signed-off-by: Stefan Roese <sr@denx.de>

common/hush.c

diff --git a/common/hush.c b/common/hush.c
index 75c18ce..093c428 100644
--- a/common/hush.c
+++ b/common/hush.c
@@ -115,7 +115,6 @@
 #include <signal.h>
 
 /* #include <dmalloc.h> */
-/* #define DEBUG_SHELL */
 
 #if 1
 #include "busybox.h"
@@ -360,6 +359,11 @@
 };
 #endif
 
+/* define DEBUG_SHELL for debugging output (obviously ;-)) */
+#if 0
+#define DEBUG_SHELL
+#endif
+
 /* This should be in utility.c */
 #ifdef DEBUG_SHELL
 #ifndef __U_BOOT__
@@ -371,7 +375,7 @@
 	va_end(args);
 }
 #else
-#define debug_printf printf             /* U-Boot debug flag */
+#define debug_printf(fmt,args...)	printf (fmt ,##args)
 #endif
 #else
 static inline void debug_printf(const char *format, ...) { }