Fix cpp example for old compillers

Jan Breuer

2016-06-02 4998131d17b97cf0cf7260acfb91d6fcadf522eb

 libscpi/src/lexer_private.h

@@ -58,6 +58,7 @@
    int scpiLex_Semicolon(lex_state_t * state, scpi_token_t * token) LOCAL;
    int scpiLex_Colon(lex_state_t * state, scpi_token_t * token) LOCAL;
    int scpiLex_NewLine(lex_state_t * state, scpi_token_t * token) LOCAL;
    int scpiLex_SpecificCharacter(lex_state_t * state, scpi_token_t * token, char chr) LOCAL;

#ifdef   __cplusplus
}