Ensure schlick is available when using clearcoat with GGX

servers/rendering/renderer_rd/shaders/scene_forward_lights_inc.glsl

@@ -134,10 +134,8 @@ void light_compute(vec3 N, vec3 L, vec3 V, float A, vec3 light_color, bool is_di
 		float ccNdotL = max(min(A + dot(vertex_normal, L), 1.0), 0.0);
 		float ccNdotH = clamp(A + dot(vertex_normal, H), 0.0, 1.0);
 		float ccNdotV = max(dot(vertex_normal, V), 1e-4);
-
-#if !defined(SPECULAR_SCHLICK_GGX)
 		float cLdotH5 = SchlickFresnel(cLdotH);
-#endif
+
 		float Dr = D_GGX(ccNdotH, mix(0.001, 0.1, clearcoat_roughness));
 		float Gr = 0.25 / (cLdotH * cLdotH);
 		float Fr = mix(.04, 1.0, cLdotH5);
@@ -212,7 +210,9 @@ void light_compute(vec3 N, vec3 L, vec3 V, float A, vec3 light_color, bool is_di
 			float G = V_GGX(cNdotL, cNdotV, alpha_ggx);
 #endif // LIGHT_ANISOTROPY_USED
 	   // F
+#if !defined(LIGHT_CLEARCOAT_USED)
 			float cLdotH5 = SchlickFresnel(cLdotH);
+#endif
 			// Calculate Fresnel using specular occlusion term from Filament:
 			// https://google.github.io/filament/Filament.html#lighting/occlusion/specularocclusion
 			float f90 = clamp(dot(f0, vec3(50.0 * 0.33)), metallic, 1.0);