Allow usage of node tool for postgis zm geometries

Author: mhugent

src/providers/postgres/qgspostgresprovider.cpp

@@ -2660,8 +2660,6 @@ bool QgsPostgresProvider::getGeometryDetails()
     {
       detectedType = result.PQgetvalue( 0, 0 );
       detectedSrid = result.PQgetvalue( 0, 1 );
-      if ( result.PQgetvalue( 0, 2 ).toInt() == 4 )
-        mForce2d = true;
       mSpatialColType = sctGeometry;
     }
     else
@@ -2878,7 +2876,7 @@ bool QgsPostgresProvider::getGeometryDetails()
     // explicitly disable adding new features and editing of geometries
     // as this would lead to corruption of measures
     QgsMessageLog::logMessage( tr( "Editing and adding disabled for 2D+ layer (%1; %2)" ).arg( mGeometryColumn ).arg( mQuery ) );
-    mEnabledCapabilities &= ~( QgsVectorDataProvider::ChangeGeometries | QgsVectorDataProvider::AddFeatures );
+    mEnabledCapabilities &= ~( QgsVectorDataProvider::AddFeatures );
   }
 
   QgsDebugMsg( QString( "Feature type name is %1" ).arg( QGis::featureType( geometryType() ) ) );