Fix potential memory leak in argz_replace

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

newlib/ChangeLog

@@ -1,3 +1,7 @@
+2015-05-27  David Stacey  <drstacey@tiscali.co.uk>
+
+	* libc/argz/argz_replace.c: Fix potential memory leak.
+
 2015-05-26  DJ Delorie  <dj@redhat.com>
 
 	* libm/math/e_sqrt.c (__ieee754_sqrt): Don't truncate constant to

newlib/libc/argz/argz_replace.c

@@ -71,7 +71,10 @@ _DEFUN (argz_replace, (argz, argz_len, str, with, replace_count),
 
       /* reallocate argz, and copy over the new value. */
       if(!(*argz = (char *)realloc(*argz, new_argz_len)))
-        return ENOMEM;
+        {
+          free(new_argz);
+          return ENOMEM;
+        }
 
       memcpy(*argz, new_argz, new_argz_len);
       *argz_len = new_argz_len;