common/hush: make get_local_var visible for other users

Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Acked-by: Heiko Schocher <hs@denx.de>
cc: Wolfgang Denk <wd@denx.de>
cc: Detlev Zundel <dzu@denx.de>
cc: Valentin Longchamp <valentin.longchamp@keymile.com>
Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
diff --git a/include/hush.h b/include/hush.h
index 0805ff3..5c566cc 100644
--- a/include/hush.h
+++ b/include/hush.h
@@ -34,6 +34,7 @@
 
 int set_local_var(const char *s, int flg_export);
 void unset_local_var(const char *name);
+char *get_local_var(const char *s);
 
 #if defined(CONFIG_HUSH_INIT_VAR)
 extern int hush_init_var (void);