Fix float parsing for number starting with 0.

src/main/php/PDepend/Source/Language/PHP/AbstractPHPParser.php

@@ -8216,7 +8216,7 @@ private function getNumberFromImage($numberRepresentation)
                 return bindec(substr($numberRepresentation, 2));
 
             default:
-                if (substr($numberRepresentation, 0, 1) === '0') {
+                if (preg_match('/^0+(oO)?\d/', $numberRepresentation)) {
                     return octdec(preg_replace('/^0+(oO)?/', '', $numberRepresentation));
                 }
 

src/test/php/PDepend/Source/AST/ASTLiteralTest.php

@@ -217,6 +217,23 @@ public function testLiteralWithNonZeroBinaryIntegerValue()
         $this->assertEquals('0b100100100110', $literal->getImage());
     }
 
+    /**
+     * testLiteralWithZeroFloatValue
+     *
+     * @return void
+     * @since 2.16.0
+     * @covers \PDepend\Source\Language\PHP\AbstractPHPParser
+     */
+    public function testLiteralWithZeroFloatValue()
+    {
+        $class = $this->getFirstClassForTestCase();
+        $properties = $class->getProperties();
+        /** @var ASTProperty $property */
+        $property = $properties[0];
+
+        $this->assertSame(0.0, $property->getDefaultValue());
+    }
+
     /**
      * testLiteralWithCurlyBraceFollowedByCompoundExpression
      *

src/test/resources/files/Source/AST/ASTLiteral/testLiteralWithZeroFloatValue.php

@@ -0,0 +1,6 @@
+<?php
+
+class testLiteralWithZeroFloatValue
+{
+    private float $amount = 0.00;
+}