Fix crash when anisotropy is on and no bump texture

src/Shaders/ShadersInclude/bumpVertex.fx

@@ -1,4 +1,4 @@
-#if defined(BUMP) || defined(PARALLAX) || defined(CLEARCOAT_BUMP)
+#if defined(BUMP) || defined(PARALLAX) || defined(CLEARCOAT_BUMP) || defined(ANISOTROPIC)
 	#if defined(TANGENT) && defined(NORMAL)
 		vec3 tbnNormal = normalize(normalUpdated);
 		vec3 tbnTangent = normalize(tangentUpdated.xyz);

src/Shaders/ShadersInclude/bumpVertexDeclaration.fx

@@ -1,4 +1,4 @@
-#if defined(BUMP) || defined(PARALLAX) || defined(CLEARCOAT_BUMP)
+#if defined(BUMP) || defined(PARALLAX) || defined(CLEARCOAT_BUMP) || defined(ANISOTROPIC)
 	#if defined(TANGENT) && defined(NORMAL) 
 		varying mat3 vTBN;
 	#endif