Catch std::exception by reference (#20385)

src/modules/PowerOCR/PowerOCRModuleInterface/dllmain.cpp

@@ -144,7 +144,7 @@ private:
 
             parse_hotkey(settings);
         }
-        catch (std::exception ex)
+        catch (std::exception&)
         {
             Logger::warn(L"An exception occurred while loading the settings file");
             // Error while loading from the settings file. Let default values stay as they are.
@@ -220,7 +220,7 @@ public:
             // Otherwise call a custom function to process the settings before saving them to disk:
             // save_settings();
         }
-        catch (std::exception ex)
+        catch (std::exception&)
         {
             // Improper JSON.
         }