fixes memory leak in func_audiohookinherit.c

(closes issue 0015394)
Reported by: boroda
Patches:
      bug15394_memoryleak_diff2.txt uploaded by dbrooks (license 790)
Tested by: dbrooks, boroda



git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@228272 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/func_audiohookinherit.c

@@ -77,6 +77,7 @@ static void audiohook_inheritance_fixup(void *data, struct ast_channel *old_chan
 				audiohook->source, old_chan->name, old_chan, new_chan->name, new_chan);
 		}
 	}
+	ast_free(datastore);
 	return;
 }