[travis] Unblacklist expression test on osx

Author: m-kuhn

.ci/travis/macos/blacklist.txt

@@ -17,7 +17,6 @@ qgis_composerutilstest
 qgis_composertablev2test
 qgis_distanceareatest
 qgis_diagramtest
-qgis_expressiontest
 qgis_fontmarkertest
 qgis_labelingenginetest
 qgis_legendrenderertest

tests/src/core/testqgsexpression.cpp

@@ -852,7 +852,7 @@ class TestQgsExpression: public QObject
       QTest::newRow( "smooth null" ) << "smooth(NULL,5)" << false << QVariant();
       QTest::newRow( "smooth point" ) << "geom_to_wkt(smooth(geom_from_wkt('POINT(1 2)'),10))" << false << QVariant( "Point (1 2)" );
       QTest::newRow( "smooth line" ) << "geom_to_wkt(smooth(geometry:=geom_from_wkt('LineString(0 0, 5 0, 5 5)'),iterations:=1,offset:=0.2,min_length:=-1,max_angle:=180))" << false << QVariant( "LineString (0 0, 4 0, 5 1, 5 5)" );
-      QTest::newRow( "transform invalid" ) << "transform(make_point(0,0),'EPSG:4326','EPSG:28356')" << false << QVariant();
+      QTest::newRow( "transform invalid" ) << "transform(make_point(500,500),'EPSG:4326','EPSG:28356')" << false << QVariant();
 
       // string functions
       QTest::newRow( "lower" ) << "lower('HeLLo')" << false << QVariant( "hello" );