rename SvRef::AddRef to AddFirstRef

to make it's intended purpose clearly distinguishable from AddNextRef

Change-Id: I5da780b48b19fd873667b648031bc394113f953b
Reviewed-on: https://gerrit.libreoffice.org/11763
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>

basic/source/classes/sbxmod.cxx

@@ -2103,11 +2103,11 @@ ErrCode SbMethod::Call( SbxValue* pRet, SbxVariable* pCaller )
     }
     // RefCount vom Modul hochzaehlen
     SbModule* pMod_ = static_cast<SbModule*>(GetParent());
-    pMod_->AddRef();
+    pMod_->AddFirstRef();
 
     // Increment the RefCount of the Basic
     StarBASIC* pBasic = static_cast<StarBASIC*>(pMod_->GetParent());
-    pBasic->AddRef();
+    pBasic->AddFirstRef();
 
     // Establish the values to get the return value
     SbxValues aVals;