BUG: skip exception when checking SpaceGroup origins

CreateCrystalFromCIF checks possible SpaceGroup origins with
SpaceGroup::ChangeSpaceGroup() so we need to skip exception
due to invalid SG symbol.

Author: pavoljuhas

ObjCryst/ObjCryst/CIF.cpp

@@ -1120,8 +1120,15 @@ Crystal* CreateCrystalFromCIF(CIF &cif,const bool verbose,const bool checkSymAsX
             unsigned int bestscore=0;
             for(vector<string>::const_iterator posOrig=origin_list.begin();posOrig!=origin_list.end();++posOrig)
             {
-               // The origin extension may not make sense, but this will be handled internally in SpaceGroup
-               pCryst->GetSpaceGroup().ChangeSpaceGroup(hmorig+*posOrig);
+               // The origin extension may not make sense, so we need to watch for ObjCrystException
+               try
+               {
+                  pCryst->GetSpaceGroup().ChangeSpaceGroup(hmorig+*posOrig);
+               }
+               catch(ObjCrystException e)
+               {
+                  continue;
+               }
 
                // If the symbol is the same as before, the origin probably was not understood - no need to test
                if((posOrig!=origin_list.begin())&&(pCryst->GetSpaceGroup().GetName()==bestsymbol)) continue;