fixed variable names to match the .c file

CSA05/kmeans.h

@@ -2,6 +2,6 @@
 #define KMEANS_H
 
 // calculate kmeans using m steps of Lloyd's algorithm
-void calc_kmeans (double data[], int rows, int cols, double kmeans[], int k, int m);
+void calc_kmeans (double data[], int num_points, int dim, double kmeans[], int k, int m);
 
 #endif