Fix uninitialized string offset in UnnecessaryNamespaceUsage, fixes mayflower#212

Author: xalopp

MO4/Sniffs/Formatting/UnnecessaryNamespaceUsageSniff.php

@@ -224,13 +224,18 @@ protected function getUseStatements(File $phpcsFile, int $start, int $end): arra
                 $end,
                 true
             );
-            $classNameEnd   = (int) $phpcsFile->findNext(
+            $classNameEnd   = $phpcsFile->findNext(
                 $this->classNameTokens,
                 ($classNameStart + 1),
                 $end,
                 true
             );
-            $useEnd         = $phpcsFile->findNext(
+
+            if (false === $classNameEnd) {
+                break;
+            }
+
+            $useEnd = $phpcsFile->findNext(
                 [
                     T_SEMICOLON,
                     T_COMMA,

MO4/Tests/Formatting/UnnecessaryNamespaceUsageUnitTest.pass.6.inc

@@ -0,0 +1,15 @@
+<?php
+
+namespace T;
+
+use A;class B
+{
+  /**
+   * B's constructor
+   */
+    public function __construct()
+    {
+        $a = new A();
+        $a->b();
+    }
+}

MO4/Tests/Formatting/UnnecessaryNamespaceUsageUnitTest.php

@@ -40,6 +40,7 @@ class UnnecessaryNamespaceUsageUnitTest extends AbstractMo4SniffUnitTest
         'UnnecessaryNamespaceUsageUnitTest.pass.3.inc' => [],
         'UnnecessaryNamespaceUsageUnitTest.pass.4.inc' => [],
         'UnnecessaryNamespaceUsageUnitTest.pass.5.inc' => [],
+        'UnnecessaryNamespaceUsageUnitTest.pass.6.inc' => [],
         'UnnecessaryNamespaceUsageUnitTest.fail.1.inc' => [
             17 => 1,
             19 => 1,