* fixed bug in ShaderGeneratorEx: no code was generated

uengShaderGeneratorEx.pas

@@ -142,6 +142,7 @@ begin
     EengShaderPartInternal.Create('unable to generate code: generator is not available anymore');
   for kvp in fProperties.KeyValuePairs do
     fGeneratorPart.TrySetProperty(kvp.Key, kvp.Value);
+  fGeneratorPart.GenerateCode(aCode);
 end;
 
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