slightly more efficient iterator handling

diff --git a/src/Environment/fgmetar.cxx b/src/Environment/fgmetar.cxx
index c172d92a7b180819203a4d6c052a6e93b7da28d4..a543832e7d6bcb436b87dea9031984f02525b16b 100644 (file)
--- a/src/Environment/fgmetar.cxx
+++ b/src/Environment/fgmetar.cxx
@@ -104,9 +104,9 @@ FGMetar::FGMetar(const string& icao, const string& proxy, const string& port, co
 
        // clouds
        vector<SGMetarCloud> cv = _clouds;
-       vector<SGMetarCloud>::iterator cloud;
+       vector<SGMetarCloud>::iterator cloud, cv_end = cv.end();
 
-       for (i = 0, cloud = cv.begin(); cloud != cv.end(); cloud++, i++) {
+       for (i = 0, cloud = cv.begin(); cloud != cv_end; ++cloud, i++) {
                int cov = cloud->getCoverage();
                if (cov == -1)
                        cov = 0;
@@ -131,8 +131,8 @@ FGMetar::FGMetar(const string& icao, const string& proxy, const string& port, co
 
        // snow cover
        map<string, SGMetarRunway> rm = getRunways();
-       map<string, SGMetarRunway>::const_iterator runway;
-       for (runway = rm.begin(); runway != rm.end(); runway++) {
+       map<string, SGMetarRunway>::const_iterator runway, rm_end = rm.end();
+       for (runway = rm.begin(); runway != rm_end; ++runway) {
                SGMetarRunway rwy = runway->second;
                if (rwy.getDeposit() >= 3 ) {
                        _snow_cover = true;