Merge pull request #1394 from Oslandia/fix_atlas_signals

Fix atlas signal emitting

Author: nyalldawson

src/core/composer/qgscomposermap.cpp

@@ -699,6 +699,7 @@ void QgsComposerMap::setNewAtlasFeatureExtent( const QgsRectangle& extent )
 {
   if ( mAtlasFeatureExtent == extent )
   {
+    emit preparedForAtlas();
     return;
   }