coverity#1215389 Uncaught exception

Change-Id: I107817e730ca0bd94d66ecf9719c3a6eb273e4f1

vcl/workben/vcldemo.cxx

@@ -43,6 +43,8 @@ void Main();
 
 SAL_IMPLEMENT_MAIN()
 {
+    try
+    {
         tools::extendApplicationEnvironment();
 
         Reference< XComponentContext > xContext = defaultBootstrap_InitialComponentContext();
@@ -56,6 +58,12 @@ SAL_IMPLEMENT_MAIN()
         InitVCL();
         ::Main();
         DeInitVCL();
+    }
+    catch (const Exception& e)
+    {
+        SAL_WARN("vcl.app", "Fatal exception: " << e.Message);
+        return 1;
+    }
 
     return 0;
 }