Fix(parm.h): allow size to be correctly calculated

example/n-cube.c

@@ -10,7 +10,7 @@
 #define M_PI 3.14159265358979323846
 #endif
 
-unsigned char dim = 10;
+unsigned char dim = 17;
 
 void cube(float *d_surface, int *coord, unsigned char *grid)
 {