test: increase code coverage in blas/base/zaxpy

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: passed
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: passed
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: ShabiShett07

lib/node_modules/@stdlib/blas/base/zaxpy/lib/ndarray.js

@@ -64,10 +64,7 @@ function zaxpy( N, za, zx, strideX, offsetX, zy, strideY, offsetY ) {
 	var im;
 	var i;
 
-	if ( N <= 0 ) {
-		return zy;
-	}
-	if ( dcabs1( za ) === 0.0 ) {
+	if ( N <= 0 || dcabs1( za ) === 0.0 ) {
 		return zy;
 	}
 	re = real( za );