[composer] Fix failing grid tests

Author: nyalldawson

tests/src/core/testqgscomposermapgrid.cpp

@@ -174,6 +174,7 @@ void TestQgsComposerMapGrid::frameOnly()
   mComposerMap->grid()->setAnnotationEnabled( false );
   //set a frame for testing
   mComposerMap->grid()->setFrameStyle( QgsComposerMapGrid::Zebra );
+  mComposerMap->grid()->setFramePenSize( 0.5 );
   mComposerMap->grid()->setBlendMode( QPainter::CompositionMode_SourceOver );
   QgsCompositionChecker checker( "composermap_gridframeonly", mComposition );
 

tests/src/python/test_qgscomposermapgrid.py

@@ -138,6 +138,7 @@ def testFrameOnly(self):
         self.mComposerMap.grid().setIntervalY( 2000 )
         self.mComposerMap.grid().setAnnotationEnabled( False )
         self.mComposerMap.grid().setFrameStyle( QgsComposerMapGrid.Zebra )
+        self.mComposerMap.grid().setFramePenSize( 0.5 )
         self.mComposerMap.grid().setBlendMode( QPainter.CompositionMode_SourceOver )
 
         checker = QgsCompositionChecker('composermap_gridframeonly', self.mComposition)