NS2 Alien vision patch

--- ns2/shaders/DarkVision.hlsl 2016-05-20 19:12:27.591588650 +0300
+++ ns2/shaders/DarkVision.hlsl.fixed   2016-05-20 19:10:41.548793508 +0300
@@ -96,6 +96,6 @@
     else // world geometry
     {
         float edge = abs(depth5 - depth1.r );
-        return lerp(inputPixel, edge, 0.01);
+        return lerp(inputPixel, (float4) edge, 0.01);
     }
 }
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