Fix "Issue 38551 in oss-fuzz: cpp-httplib:server_fuzzer: Timeout in server_fuzze"

Author: yhirose

httplib.h

@@ -2971,7 +2971,14 @@ inline bool gzip_decompressor::decompress(const char *data, size_t data_length,
       strm_.avail_out = static_cast<uInt>(buff.size());
       strm_.next_out = reinterpret_cast<Bytef *>(buff.data());
 
+      auto prev_avail_in = strm_.avail_in;
+
       ret = inflate(&strm_, Z_NO_FLUSH);
+
+      if (prev_avail_in - strm_.avail_in == 0) {
+        return false;
+      }
+
       assert(ret != Z_STREAM_ERROR);
       switch (ret) {
       case Z_NEED_DICT: