feat: add case for x == 0.0

---
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: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: passed
  - 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: aayush0325

lib/node_modules/@stdlib/math/base/special/exp2f/lib/main.js

@@ -74,7 +74,7 @@ var polyvalQ = require( './polyval_q.js' );
 *
 *     | arithmetic | domain      | # trials | peak    | rms     |
 *     |:----------:|:-----------:|:--------:|:-------:|:-------:|
-*     | IEEE       | -127,+127   | 100000   |  1.7e-7 | 2.8e-8  |
+*     | IEEE       | -127,+127   | 100000   | 1.7e-7  | 2.8e-8  |
 *
 * @param {number} x - input value
 * @returns {number} function value
@@ -109,6 +109,10 @@ function exp2f( x ) {
 		return 0.0;
 	}
 
+	if ( x === 0.0 ) {
+		return 1.0;
+	}
+
 	// Separate into integer and fractional parts...
 	n = float64ToFloat32( roundf( x ) );
 	x -= float64ToFloat32( n );

lib/node_modules/@stdlib/math/base/special/exp2f/src/main.c

@@ -132,6 +132,11 @@ float stdlib_base_exp2f( const float x ) {
 		return 0.0f;
 	}
 
+	// Range reduction
+	if( x == 0.0f ) {
+		return 1.0f;
+	}
+
 	// Separate into integer and fractional parts...
 	n = stdlib_base_roundf( x );
 	ax = x - n;