Make sure to zero out all the unset texture fields

These might contain garbage causing the runtime to incorrectly parse the state of the texture references.

Change-Id: I93c726fa30b580b3e14c50ac939f3c71b0d1c8d9

hipamd/include/hip/hcc_detail/hip_texture_types.h

@@ -65,6 +65,10 @@ struct __HIP_TEXTURE_ATTRIB texture : public textureReference {
         channelDesc = hipCreateChannelDesc<T>();
         sRGB = 0;
         textureObject = nullptr;
+        maxAnisotropy = 0;
+        mipmapLevelBias = 0;
+        minMipmapLevelClamp = 0;
+        maxMipmapLevelClamp = 0;
     }
 
     texture(int norm, enum hipTextureFilterMode fMode, enum hipTextureAddressMode aMode,
@@ -78,6 +82,10 @@ struct __HIP_TEXTURE_ATTRIB texture : public textureReference {
         channelDesc = desc;
         sRGB = 0;
         textureObject = nullptr;
+        maxAnisotropy = 0;
+        mipmapLevelBias = 0;
+        minMipmapLevelClamp = 0;
+        maxMipmapLevelClamp = 0;
     }
 };