Add Objective-C++ file extension "mm" for Objective-C

PowerEditor/src/langs.model.xml

@@ -150,7 +150,7 @@
             <Keywords name="type1">ARCHIVE CUR END FILE_ATTRIBUTE_ARCHIVE FILE_ATTRIBUTE_HIDDEN FILE_ATTRIBUTE_NORMAL FILE_ATTRIBUTE_OFFLINE FILE_ATTRIBUTE_READONLY FILE_ATTRIBUTE_SYSTEM FILE_ATTRIBUTE_TEMPORARY HIDDEN HKCC HKCR HKCU HKDD HKEY_CLASSES_ROOT HKEY_CURRENT_CONFIG HKEY_CURRENT_USER HKEY_DYN_DATA HKEY_LOCAL_MACHINE HKEY_PERFORMANCE_DATA HKEY_USERS HKLM HKPD HKU IDABORT IDCANCEL IDIGNORE IDNO IDOK IDRETRY IDYES MB_ABORTRETRYIGNORE MB_DEFBUTTON1 MB_DEFBUTTON2 MB_DEFBUTTON3 MB_DEFBUTTON4 MB_ICONEXCLAMATION MB_ICONINFORMATION MB_ICONQUESTION MB_ICONSTOP MB_OK MB_OKCANCEL MB_RETRYCANCEL MB_RIGHT MB_SETFOREGROUND MB_TOPMOST MB_USERICON MB_YESNO MB_YESNOCANCEL NORMAL OFFLINE READONLY SET SHCTX SW_HIDE SW_SHOWMAXIMIZED SW_SHOWMINIMIZED SW_SHOWNORMAL SYSTEM TEMPORARY all auto both bottom bzip2 checkbox colored current false force hide ifdiff ifnewer lastused leave left listonly lzma nevershow none normal off on pop push radiobuttons right show silent silentlog smooth textonly top true try zlib</Keywords>
             <Keywords name="type2" />
         </Language>
-        <Language name="objc" ext="" commentLine="//" commentStart="/*" commentEnd="*/">
+        <Language name="objc" ext="mm" commentLine="//" commentStart="/*" commentEnd="*/">
             <Keywords name="instre1">if else switch case default break goto return for while do continue typedef sizeof NULL self super nil NIL</Keywords>
             <Keywords name="instre2">interface implementation protocol end private protected public class selector encode defs</Keywords>
             <Keywords name="type1">void struct union enum char short int long double float signed unsigned const static extern auto register volatile id Class SEL IMP BOOL</Keywords>