test: account for N * alpha in test case

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---

Author: Planeshifter

lib/node_modules/@stdlib/blas/ext/base/dsapxsum/test/test.dsapxsum.js

@@ -62,7 +62,7 @@ tape( 'the function adds a constant and calculates the sum of all strided array
 
 	x = new Float32Array( [ 1.0, 1.0e38, 1.0, -1.0e38 ] );
 	v = dsapxsum( x.length, 5.0, x, 1 );
-	t.strictEqual( v, 0.0, 'returns expected value' );
+	t.strictEqual( v, 20.0, 'returns expected value' );
 
 	x = new Float32Array( 1e3 );
 	for ( i = 0; i < 1e3; i++ ) {

lib/node_modules/@stdlib/blas/ext/base/dsapxsum/test/test.dsapxsum.native.js

@@ -180,7 +180,7 @@ tape( 'the function adds a constant and calculates the sum of all strided array
 
 	x = new Float32Array( [ 1.0, 1.0e38, 1.0, -1.0e38 ] );
 	v = dsapxsum( x.length, 5.0, x, 1 );
-	t.strictEqual( v, 0.0, 'returns expected value' );
+	t.strictEqual( v, 20.0, 'returns expected value' );
 
 	x = new Float32Array( 1e3 );
 	for ( i = 0; i < 1e3; i++ ) {