refactor: make base implementation cleaner

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---

Author: aayush0325

lib/node_modules/@stdlib/lapack/base/dgebak/lib/base.js

@@ -65,6 +65,7 @@ var swaps = require( './swaps.js' );
 */
 function dgebak( job, side, N, M, ilo, ihi, scale, strideScale, offsetScale, V, strideV1, strideV2, offsetV ) { // eslint-disable-line max-len, max-params
 	var is;
+	var iv;
 	var i;
 	var s;
 
@@ -81,14 +82,16 @@ function dgebak( job, side, N, M, ilo, ihi, scale, strideScale, offsetScale, V,
 
 	if ( job === 'scale' || job === 'both' ) {
 		is = offsetScale + ( ilo * strideScale );
+		iv = offsetV + ( ilo * strideV1 );
 		for ( i = ilo; i <= ihi; i++ ) {
 			if ( side === 'right' ) {
 				s = scale[ is ];
 			} else {
 				s = 1 / scale[ is ];
 			}
-			dscal( M, s, V, strideV2, offsetV + ( i * strideV1 ) );
+			dscal( M, s, V, strideV2, iv );
 			is += strideScale;
+			iv += strideV1;
 		}
 	}