fix(compress): reject by-reference dictionaries in Rust fast path

Include localDict.dict in the eligibility guard for the simple Rust compress2 route. By-reference dictionary loads populate this field without populating dictBuffer, so omitting it incorrectly allowed a dictionary-bearing context to bypass the C dictionary path.

Test Plan:
- ./tests/fuzzer -s9634 -v
- git diff --check

lib/compress/zstd_compress.c

@@ -3942,6 +3942,7 @@ int ZSTD_rust_simpleCompress2Level(const void* opaqueCctx, size_t srcSize)
         || cctx->seqCollector.collectSequences != 0
         || cctx->cdict != NULL
         || cctx->prefixDict.dict != NULL
+        || cctx->localDict.dict != NULL
         || cctx->localDict.dictBuffer != NULL
         || cctx->localDict.cdict != NULL) {
         return (-2147483647 - 1);