Fix FTBFS from prior commit.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

poxml/antlr/antlr/CharScanner.h

@@ -36,14 +36,15 @@
  */
 
 #include <cstdio>
+#include <functional>
+#include <map>
+
 #include "antlr/config.h"
 #include "antlr/TokenStream.h"
 #include "antlr/RecognitionException.h"
 #include "antlr/InputBuffer.h"
 #include "antlr/BitSet.h"
 #include "antlr/LexerSharedInputState.h"
-#include <map>
-#include <cstdio>
 
 ANTLR_BEGIN_NAMESPACE(antlr)