Fixed all warnings with -Wall and -Wextra

tests/TestCubicSurfaceExtractor.cpp

@@ -104,7 +104,6 @@ void TestCubicSurfaceExtractor::testExecute()
 	const static uint32_t uExpectedIndices = 9936;
 	const static uint32_t uMaterialToCheck = 3000;
 	const static float fExpectedMaterial = 42.0f;
-	const static float fNoMaterial = 1.0f;
 	const static uint32_t uIndexToCheck = 2000;
 	const static uint32_t uExpectedIndex = 1334;
 

tests/TestSurfaceExtractor.cpp

@@ -50,7 +50,7 @@ public:
 		return voxel;
 	}
 
-	float convertToMaterial(float voxel)
+	float convertToMaterial(float /*voxel*/)
 	{
 		return 1;
 	}
@@ -83,7 +83,7 @@ void writeDensityValueToVoxel(int valueToWrite, MaterialDensityPair88& voxel)
 }
 
 template<typename VoxelType>
-void writeMaterialValueToVoxel(int valueToWrite, VoxelType& voxel)
+void writeMaterialValueToVoxel(int /*valueToWrite*/, VoxelType& /*voxel*/)
 {
 	//Most types don't have a material
 	return;