HDRenderPipeline: Fix misc compiler warning

ScriptableRenderPipeline/Core/CoreRP/MousePositionDebug.cs

             }
         }
 
+#if UNITY_EDITOR
-#if UNITY_EDITOR
         private void OnSceneGUI(UnityEditor.SceneView sceneview)
         {
             m_mousePosition = Event.current.mousePosition;

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Debug/DebugViewTiles.shader

 
                 int2 pixelCoord = posInput.positionSS.xy;
                 int2 tileCoord = (float2)pixelCoord / GetTileSize();
-                int2 mouseTileCoord = _MousePixelCoord / GetTileSize();
+                int2 mouseTileCoord = _MousePixelCoord.xy / GetTileSize();
                 int2 offsetInTile = pixelCoord - tileCoord * GetTileSize();
 
                 int n = 0;
                 int maxLights = 32;
                 if (tileCoord.y < LIGHTCATEGORY_COUNT && tileCoord.x < maxLights + 3)
                 {
-                    PositionInputs mousePosInput = GetPositionInput(_MousePixelCoord, _ScreenSize.zw, mouseTileCoord);
+                    PositionInputs mousePosInput = GetPositionInput(_MousePixelCoord.xy, _ScreenSize.zw, mouseTileCoord);
                     float depthMouse = LOAD_TEXTURE2D(_MainDepthTexture, mousePosInput.positionSS).x;
                     UpdatePositionInput(depthMouse, UNITY_MATRIX_I_VP, UNITY_MATRIX_VP, mousePosInput);
 

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Sky/ProceduralSky/Resources/ProceduralSky.shader

     float getMiePhase(float eyeCos, float eyeCos2)
     {
         float temp = 1.0 + MIE_G2 - 2.0 * MIE_G * eyeCos;
-        temp = pow(max(temp, 0), pow(_SunSize,0.65) * 10);
+        temp = PositivePow(temp, PositivePow(_SunSize, 0.65) * 10);
-        #if defined(UNITY_COLORSPACE_GAMMA) && SKYBOX_COLOR_IN_TARGET_COLOR_SPACE
-            temp = pow(temp, .454545);
-        #endif
         return temp;
     }