Fix uninitialized variable warnings in smskceil benchmark

Author: yugalkaushik

lib/node_modules/@stdlib/math/strided/special/smskceil/benchmark/c/benchmark.length.c

@@ -121,6 +121,10 @@ static double benchmark( int iterations, int len ) {
 	double t;
 	int i;
 
+	memset(m, 0, len * sizeof(uint8_t));  
+	memset(x, 0, len * sizeof(float));
+	memset(y, 0, len * sizeof(float));
+
 	for ( i = 0; i < len; i++ ) {
 		x[ i ] = rand_uniformf( -10.0f, 10.0f );
 		y[ i ] = 0.0f;