fcl-image: canvas AllocateResources: propagate exceptions to be able to properly handle (e.g. log) them

git-svn-id: trunk@43335 -

packages/fcl-image/src/fphelper.inc

@@ -114,6 +114,8 @@ begin
   except
     FCanvas := nil;
     FAllocated := False;
+
+    raise;
   end;
 end;