bench: fix value range

Author: kgryte

lib/node_modules/@stdlib/ndarray/base/sub2ind/benchmark/benchmark.js

@@ -280,7 +280,7 @@ bench( pkg+':mode=[normalize]', function benchmark( b ) {
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		s2 = floor( randu()*2000.0 ) - 1000.0;
+		s2 = floor( randu()*20.0 ) - 10.0;
 		out = sub2ind( shape, strides, offset, s0, s1, s2, mode );
 		if ( out !== out ) {
 			b.fail( 'should not return NaN' );
@@ -319,7 +319,7 @@ bench( pkg+':mode=[normalize],offset=0', function benchmark( b ) {
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		s2 = floor( randu()*2000.0 ) - 1000.0;
+		s2 = floor( randu()*20.0 ) - 10.0;
 		out = sub2ind( shape, strides, offset, s0, s1, s2, mode );
 		if ( out !== out ) {
 			b.fail( 'should not return NaN' );