Merge pull request #1726 from elsid/fix_catch_warnings

Fix warnings: catching polymorphic type by value

apps/openmw/mwworld/worldimp.cpp

@@ -2601,11 +2601,11 @@ namespace MWWorld
                 int y = std::stoi(name.substr(name.find(',')+1));
                 ext = getExterior(x, y)->getCell();
             }
-            catch (std::invalid_argument)
+            catch (const std::invalid_argument&)
             {
                 // This exception can be ignored, as this means that name probably refers to a interior cell instead of comma separated coordinates
             }
-            catch (std::out_of_range)
+            catch (const std::out_of_range&)
             {
                 throw std::runtime_error("Cell coordinates out of range.");
             }

components/widgets/numericeditbox.cpp

@@ -38,11 +38,11 @@ namespace Gui
                 setCaption(MyGUI::utility::toString(mValue));
             }
         }
-        catch (std::invalid_argument)
+        catch (const std::invalid_argument&)
         {
             setCaption(MyGUI::utility::toString(mValue));
         }
-        catch (std::out_of_range)
+        catch (const std::out_of_range&)
         {
             setCaption(MyGUI::utility::toString(mValue));
         }