[wasm][bug] Exit early in Delegate in case of error

We need to exit before FallThruTo invokes DCHECK(this->ok()).

Bug: chromium:1194316
Change-Id: I77eb58cbe232277cc8fc3cc0d1c327d7eba8bfb3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2796954Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73742}

src/wasm/function-body-decoder-impl.h

@@ -2585,6 +2585,7 @@ class WasmFullDecoder : public WasmDecoder<validate> {
         target->is_try_unwind()) {
       this->DecodeError(
           "cannot delegate inside the catch handler of the target");
+      return 0;
     }
     FallThruTo(c);
     CALL_INTERFACE_IF_PARENT_REACHABLE(Delegate, imm.depth + 1, c);