Minor fixes

*Seed is uint instead of int
*Permutation table is uint instead of int, could lead before to program
crash with negative seeds


Former-commit-id: 49ad04987a09a5f5b4bcab6ee3916db9818172b6

include/Nazara/Noise/Perlin3D.hpp

@@ -16,7 +16,7 @@ class NAZARA_API NzPerlin3D : public NzAbstract3DNoise
 {
     public:
         NzPerlin3D();
-        NzPerlin3D(int seed);
+        NzPerlin3D(unsigned int seed);
         float GetValue(float x, float y, float z, float resolution);
         ~NzPerlin3D() = default;
     protected: