refactor: pointer arithmetic

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---

Author: aayush0325

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

@@ -194,6 +194,9 @@ function dgebal( job, N, A, strideA1, strideA2, offsetA, out, strideOut, offsetO
 			is = offsetScale + ( k * strideScale ); // Follows scale
 			ia1 = offsetA + ( k * strideA2 ); // Follows `j`th column of A
 			ia2 = offsetA + ( k * strideA2 ); // Follows `k`th column of A
+			ia3 = offsetA + ( k * strideA1 ); // Follows `j`th row of A
+			ia4 = offsetA + ( k * strideA1 ); // Follows `k`th row of A
+
 			for ( j = k; j <= l; j++ ) {
 				canSwap = true;
 				for ( i = k; i <= l; i++ ) {
@@ -207,16 +210,18 @@ function dgebal( job, N, A, strideA1, strideA2, offsetA, out, strideOut, offsetO
 					scale[ is ] = j;
 					if ( j !== k ) {
 						dswap( l+1, A, strideA1, ia1, A, strideA1, ia2 );
-						dswap( N-k, A, strideA2, offsetA + (j*strideA1), A, strideA2, offsetA + (k*strideA1) );
+						dswap( N-k, A, strideA2, ia3, A, strideA2, ia4 );
 					}
 					noconv = true;
 					k += 1;
 
 					is += strideScale;
 					ia2 += strideA2;
+					ia4 += strideA1;
 				}
 
 				ia1 += strideA2;
+				ia3 += strideA1;
 			}
 		}
 	}