Fix out-of-bounds indexing

Author: kgryte

lib/node_modules/@stdlib/ndarray/base/assert/is-safe-data-type-cast/benchmark/benchmark.js

@@ -38,11 +38,13 @@ bench( pkg, function benchmark( b ) {
 	var out;
 	var i;
 	var j;
+	var k;
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
 		j = i % DTYPES.length;
-		out = isSafeCast( DTYPES[ j ], DTYPES[ j+1 ] );
+		k = (i+1) % DTYPES.length;
+		out = isSafeCast( DTYPES[ j ], DTYPES[ k ] );
 		if ( typeof out !== 'boolean' ) {
 			b.fail( 'should return a boolean' );
 		}

lib/node_modules/@stdlib/ndarray/base/assert/is-same-kind-data-type-cast/benchmark/benchmark.js

@@ -38,11 +38,13 @@ bench( pkg, function benchmark( b ) {
 	var out;
 	var i;
 	var j;
+	var k;
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
 		j = i % DTYPES.length;
-		out = isSameKindCast( DTYPES[ j ], DTYPES[ j+1 ] );
+		k = (i+1) % DTYPES.length;
+		out = isSameKindCast( DTYPES[ j ], DTYPES[ k ] );
 		if ( typeof out !== 'boolean' ) {
 			b.fail( 'should return a boolean' );
 		}