Merge branch 'fix/sticker-find-arguments' of github.com:acts-1631/MPD into v0.24.x

Author: MaxKellermann

NEWS

@@ -1,6 +1,6 @@
 ver 0.24.15 (not yet released)
 * protocol
-  - fix crash on "sticker delete"
+  - fix crash on "sticker delete" and "sticker find"
 * database
   - upnp: fix crash bug
 * input

src/command/StickerCommands.cxx

@@ -524,7 +524,12 @@ handle_sticker(Client &client, Request args, Response &r)
 			args.pop_back();
 		}
 
-		bool has_op = args.size() > 4;
+		if (args.size() != 4 && args.size() != 6) {
+			r.Error(ACK_ERROR_ARG, "bad request");
+			return CommandResult::ERROR;
+		}
+
+		const bool has_op = args.size() == 6;
 		auto value = has_op ? args[5] : nullptr;
 		StickerOperator op = StickerOperator::EXISTS;
 		if (has_op) {