fix shader library compile regression

Packages/com.verasl.water-system/Shaders/WaterCommon.hlsl

 	//return fresnelTerm.xxxx;
 
     BRDFData brdfData;
-    InitializeBRDFData(half3(0, 0, 0), 0, half3(1, 1, 1), 0.95, 1, brdfData);
+    half alpha = 1;
+    InitializeBRDFData(half3(0, 0, 0), 0, half3(1, 1, 1), 0.95, alpha, brdfData);
 	half3 spec = DirectBDRF(brdfData, IN.normal, mainLight.direction, IN.viewDir) * shadow * mainLight.color;
 #ifdef _ADDITIONAL_LIGHTS
     uint pixelLightCount = GetAdditionalLightsCount();