bench: move declaration

Signed-off-by: Athan <kgryte@gmail.com>

Author: kgryte

lib/node_modules/@stdlib/stats/strided/distances/dminkowski/benchmark/c/benchmark.length.c

@@ -174,20 +174,20 @@ static double benchmark2( int iterations, int len, double p ) {
 */
 int main( void ) {
 	double elapsed;
-	double *powers;
 	int count;
 	int iter;
 	int len;
 	int i;
 	int j;
 	int p;
+	
+	const double powers[ 4 ] = { 1.0, 2.0, 10.0, INFINITY };
 
 	// Use the current time to seed the random number generator:
 	srand( time( NULL ) );
 
 	print_version();
 	count = 0;
-	powers = (double[]) { 1.0, 2.0, 10.0, INFINITY };
 	for ( i = MIN; i <= MAX; i++ ) {
 		len = pow( 10, i );
 		iter = ITERATIONS / pow( 10, i-1 );