[Yaml] fix the displayed line number

`getRealCurrentLineNb()` returns line numbers index by 0 (as they serve
as array indexes internally).

Author: xabbuh

src/Symfony/Component/Yaml/Command/LintCommand.php

@@ -105,7 +105,7 @@ private function validate($content, $file = null)
     {
         $prevErrorHandler = set_error_handler(function ($level, $message, $file, $line) use (&$prevErrorHandler) {
             if (E_USER_DEPRECATED === $level) {
-                throw new ParseException($message, $this->getParser()->getLastLineNumberBeforeDeprecation());
+                throw new ParseException($message, $this->getParser()->getRealCurrentLineNb() + 1);
             }
 
             return $prevErrorHandler ? $prevErrorHandler($level, $message, $file, $line) : false;

src/Symfony/Component/Yaml/Parser.php

@@ -124,16 +124,6 @@ public function parse($value, $flags = 0)
         return $data;
     }
 
-    /**
-     * @internal
-     *
-     * @return int
-     */
-    public function getLastLineNumberBeforeDeprecation()
-    {
-        return $this->getRealCurrentLineNb();
-    }
-
     private function doParse($value, $flags)
     {
         $this->currentLineNb = -1;
@@ -463,9 +453,11 @@ private function parseBlock($offset, $yaml, $flags)
     /**
      * Returns the current line number (takes the offset into account).
      *
+     * @internal
+     *
      * @return int The current line number
      */
-    private function getRealCurrentLineNb()
+    public function getRealCurrentLineNb()
     {
         $realCurrentLineNumber = $this->currentLineNb + $this->offset;