Avoid uncaught exception when checking SG names

Fix parsing of COD 4316154 CIF.  Testing of Hall name may raise
invalid_argument which needs to be caught to test H-M name next.

Revert to generic exception handling as in v2017.2

Author: pavoljuhas

ObjCryst/ObjCryst/SpaceGroup.cpp

@@ -588,7 +588,7 @@ void SpaceGroup::InitSpaceGroup(const string &spgId)
       delete mpCCTbxSpaceGroup;
       mpCCTbxSpaceGroup = nsg;
    }
-   catch(cctbx::error ex1)
+   catch(exception ex1)
    {
       try
       {
@@ -599,7 +599,7 @@ void SpaceGroup::InitSpaceGroup(const string &spgId)
          delete mpCCTbxSpaceGroup;
          mpCCTbxSpaceGroup = nsg;
       }
-      catch(cctbx::error ex2)
+      catch(exception ex2)
       {
          (*fpObjCrystInformUser)("Could not interpret Spacegroup Symbol:"+spgId);
          string emsg = "Space group symbol '" + spgId + "' not recognized";
@@ -644,7 +644,7 @@ void SpaceGroup::InitSpaceGroup(const string &spgId)
 
       mExtension='\0'; //this->GetCCTbxSpg().type().extension();
    }
-   catch(cctbx::error ex)
+   catch(exception ex)
    {
       (*fpObjCrystInformUser)("Error initializing spacegroup (Incorrect Hall symbol ?):"+spgId);
       if (mId != spgId)