X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;ds=sidebyside;f=src%2FNetwork%2Fnmea.cxx;h=d32d6953de844a283617065b8c19cd244f1f87d5;hb=796aa8b3520672274cbdb26c4d4784161be962d3;hp=7eeb98827281cd75430e6445059a095b5b0750cf;hpb=57163baca0d8df24ad51049b62a650c6986f4cec;p=flightgear.git

diff --git a/src/Network/nmea.cxx b/src/Network/nmea.cxx
index 7eeb98827..d32d6953d 100644
--- a/src/Network/nmea.cxx
+++ b/src/Network/nmea.cxx
@@ -476,13 +476,13 @@ bool FGNMEA::process() {
 	    return false;
 	}
     } else if ( get_direction() == in ) {
-	if ( length = io->readline( buf, FG_MAX_MSG_SIZE ) ) {
+	if ( (length = io->readline( buf, FG_MAX_MSG_SIZE )) > 0 ) {
 	    parse_message();
 	} else {
 	    FG_LOG( FG_IO, FG_ALERT, "Error reading data." );
 	    return false;
 	}
-	if ( length = io->readline( buf, FG_MAX_MSG_SIZE ) ) {
+	if ( (length = io->readline( buf, FG_MAX_MSG_SIZE )) > 0 ) {
 	    parse_message();
 	} else {
 	    FG_LOG( FG_IO, FG_ALERT, "Error reading data." );