tree.c (escaped_string::escape): Replace cast to char * by const_cast<char *> (unescaped).

2018-06-18  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>

	* tree.c (escaped_string::escape): Replace cast to char * by
	const_cast<char *> (unescaped).

From-SVN: r261700

gcc/ChangeLog

+2018-06-18  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>
+
+	* tree.c (escaped_string::escape): Replace cast to char * by
+	const_cast<char *> (unescaped).
+
 2018-06-18  Nick Clifton  <nickc@redhat.com>
 
 	PR 84195

gcc/tree.c

@@ -12454,7 +12454,7 @@ escaped_string::escape (const char *unescaped)
   if (m_owned)
     free (m_str);
 
-  m_str = (char *) unescaped;
+  m_str = const_cast<char *> (unescaped);
   m_owned = false;
 
   if (unescaped == NULL || *unescaped == 0)