It's its, not it's

Change-Id: Ic108625cdc8376095dfd19184ecad39bfeccd160

compilerplugins/clang/vclwidgets.cxx

@@ -206,7 +206,7 @@ bool VCLWidgets::VisitCXXDestructorDecl(const CXXDestructorDecl* pCXXDestructorD
         {
             report(
                 DiagnosticsEngine::Warning,
-                "OutputDevice subclass should have nothing in it's destructor but a call to disposeOnce().",
+                "OutputDevice subclass should have nothing in its destructor but a call to disposeOnce().",
                 pCXXDestructorDecl->getLocStart())
               << pCXXDestructorDecl->getSourceRange();
         }