don't print error message if incomplete

libi2pd/Gzip.cpp

@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2013-2020, The PurpleI2P Project
+* Copyright (c) 2013-2022, The PurpleI2P Project
 *
 * This file is part of Purple i2pd project and licensed under BSD3
 *
@@ -57,6 +57,7 @@ namespace data
 			if ((err = inflate (&m_Inflator, Z_NO_FLUSH)) == Z_STREAM_END)
 				return outLen - m_Inflator.avail_out;
 			// else
+			if (err)
 				LogPrint (eLogError, "Gzip: Inflate error ", err);
 			return 0;
 		}
@@ -128,6 +129,7 @@ namespace data
 			return outLen - m_Deflator.avail_out;
 		}
 		// else
+		if (err)
 			LogPrint (eLogError, "Gzip: Deflate error ", err);
 		return 0;
 	}
@@ -158,6 +160,7 @@ namespace data
 			offset = outLen - m_Deflator.avail_out;
 		}
 		// else
+		if (err)
 			LogPrint (eLogError, "Gzip: Deflate error ", err);
 		return 0;
 	}