Fixed warnings

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/Reflection/ScreenSpaceTracing.hlsl

     hitWeight = CalculateHitWeight(
         hit,
         startPositionSS.xy,
-        invLinearDepth,
+        invLinearDepth.r,
         settingsDepthBufferThickness,
         settingsRayMaxScreenDistance,
         settingsRayBlendScreenDistance

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Material/Lit/Lit.hlsl

         ZERO_INITIALIZE(ScreenSpaceRaymarchInput, ssRayInput);
 
         // Jitter the ray origin to trade some noise instead of banding effect
-        ssRayInput.rayOriginWS = rayOriginWS + rayDirWS * SampleBayer4(posInput.positionSS + uint2(_FrameCount, _FrameCount / 4)) * 0.1;
+        ssRayInput.rayOriginWS = rayOriginWS + rayDirWS * SampleBayer4(posInput.positionSS + uint2(_FrameCount, uint(_FrameCount) / 4u)) * 0.1;
         ssRayInput.rayDirWS = rayDirWS;
 #if DEBUG_DISPLAY
         ssRayInput.debug = debug;