HDRenderPipeline: Avoid divide by zero in shader + fix typo

ScriptableRenderPipeline/HDRenderPipeline/HDRenderPipeline.cs

         // Debugging
         MaterialPropertyBlock m_SharedPropertyBlock = new MaterialPropertyBlock();
         DebugDisplaySettings m_DebugDisplaySettings = new DebugDisplaySettings();
-        static DebugDisplaySettings s_NeutraDebugDisplaySettings = new DebugDisplaySettings();
+        static DebugDisplaySettings s_NeutralDebugDisplaySettings = new DebugDisplaySettings();
         DebugDisplaySettings m_CurrentDebugDisplaySettings = null;
 
         private int m_DebugFullScreenTempRT;
             if (camera.cameraType == CameraType.Reflection || camera.cameraType == CameraType.Preview)
             {
                 // Neutral allow to disable all debug settings
-                m_CurrentDebugDisplaySettings = s_NeutraDebugDisplaySettings;
+                m_CurrentDebugDisplaySettings = s_NeutralDebugDisplaySettings;
             }
             else
             {

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/LitData.hlsl

         float verticalDisplacement = maxHeight - height * maxHeight;
         // IDEA: precompute the tiling scale? MOV-MUL vs MOV-MOV-MAX-RCP-MUL.
         float tilingScale = rcp(max(_BaseColorMap0_ST.x, _BaseColorMap0_ST.y));
-        return tilingScale * verticalDisplacement / NdotV;
+        return tilingScale * verticalDisplacement / max(NdotV, 0.001);
     }
 
     return 0.0;