tdf#120703 PVS: V547 Expression '!pRTLData' is always false

Let SbiInstance::GetRTLData() return reference

Change-Id: Iafe7e64f6f296b478003ce66ea66936a65ba9edc
Reviewed-on: https://gerrit.libreoffice.org/62855
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

basic/source/inc/runtime.hxx

@@ -184,7 +184,7 @@ public:
     SbiDdeControl* GetDdeControl() { return pDdeCtrl.get(); }
     StarBASIC* GetBasic() { return pBasic; }
     SbiDllMgr* GetDllMgr();
-    SbiRTLData* GetRTLData() const { return const_cast<SbiRTLData*>(&aRTLData); }
+    SbiRTLData& GetRTLData() const { return const_cast<SbiRTLData&>(aRTLData); }
 
     std::shared_ptr<SvNumberFormatter> const & GetNumberFormatter();
     sal_uInt32 GetStdDateIdx() const { return nStdDateIdx; }