Don't reference malloc if not using alloc/free

Rich Barlow

2017-01-30 219ca4fc80ef6491555b403c6884566c8e1deefd

 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
}