Fix elasticity tensor

Source/Headers/inmost_dense.h

@@ -892,7 +892,7 @@ namespace INMOST
 						Kc(3,4) = Kc(4,3) = K[16]; //c45
 						Kc(3,5) = Kc(5,3) = K[17]; //c46
 						Kc(4,4) = K[18]; //c55
-						Kc(4,5) = Kc(5,3) = K[19]; //c56
+						Kc(4,5) = Kc(5,4) = K[19]; //c56
 						Kc(5,5) = K[20]; //c66
 						break;
 					}