Fix memory leak with rejected channel auth commands

doc/UPDATES.md

@@ -13,6 +13,7 @@
   * Fix not handling auto-op in minutely channel rechecks.
   * Fix auto-voice and auto-op not applying after a nick change.
   * Don't truncate bot's join time on .reset.
+  * Fix various small memory leaks.
 
 # 1.4.6
   * Disable demo TCL support by default to prevent confusion during build.

src/core_binds.cc

@@ -233,8 +233,10 @@ int real_check_bind_dcc(const char *cmd, int idx, const char *text, Auth *auth)
   }
 
   if (entry && auth) {
-    if (!(entry->cflags & AUTH))
+    if (!(entry->cflags & AUTH)) {
+      free(args);
       return 0;
+    }
   }
 
   hits = 0;