Using mysql_thread___protocol_compression_level in all the places

lib/mysql_data_stream.cpp

@@ -1266,9 +1266,9 @@ void MySQL_Data_Stream::generate_compressed_packet() {
 		dest1=(Bytef *)malloc(destLen1+7);
 		destLen2=len2*120/100+12;
 		dest2=(Bytef *)malloc(destLen2+7);
-		rc=compress2(dest1+7, &destLen1, (const unsigned char *)p2.ptr, len1, GloMTH->variables.protocol_compression_level);
+		rc=compress2(dest1+7, &destLen1, (const unsigned char *)p2.ptr, len1, mysql_thread___protocol_compression_level);
 		assert(rc==Z_OK);
-		rc=compress2(dest2+7, &destLen2, (const unsigned char *)p2.ptr+len1, len2, GloMTH->variables.protocol_compression_level);
+		rc=compress2(dest2+7, &destLen2, (const unsigned char *)p2.ptr+len1, len2, mysql_thread___protocol_compression_level);
 		assert(rc==Z_OK);
 
 		hdr.pkt_length=destLen1;