`ApplyShadow` result discarded during shader creation

[ajtribick]

The result of the ApplyShadow call here isn't used.

Celestia/src/celengine/shadermanager.cpp

Lines 2467 to 2469 in b54fa98

     if (props.hasShadowMap() && i == 0) 
         ApplyShadow(false); 
 } 

Need to check what this does and either append the code to source or remove the call.

[Hleb Valoshka]

oh, source += was lost when ApplyShadow was added to avoid code duplication.