comparison framework/MainWindowBase.cpp @ 188:32c13c46abd6

* Fix crash on play after New Session

     emit canRenameLayer(haveCurrentLayer);
     emit canEditLayer(haveCurrentEditableLayer);
     emit canEditLayerTabular(haveCurrentEditableLayer || haveTabularLayer);
     emit canMeasureLayer(haveCurrentLayer);
     emit canSelect(haveMainModel && haveCurrentPane);
-    emit canPlay(havePlayTarget);
+    emit canPlay(haveMainModel && havePlayTarget);
     emit canFfwd(true);
     emit canRewind(true);
     emit canPaste(haveClipboardContents);
     emit canInsertInstant(haveCurrentPane);
     emit canInsertInstantsAtBoundaries(haveCurrentPane && haveSelection);