Fix travis (does not support c11)

Jan Breuer

2016-05-31 9760a97b3e0260c71d535bc8712b53a8876ff5e7

 libscpi/src/parser_private.h

@@ -45,7 +45,7 @@

    int scpiParser_parseProgramData(lex_state_t * state, scpi_token_t * token) LOCAL;
    int scpiParser_parseAllProgramData(lex_state_t * state, scpi_token_t * token, int * numberOfParameters) LOCAL;
    int scpiParser_detectProgramMessageUnit(scpi_parser_state_t * state, const char * buffer, int len) LOCAL;
    int scpiParser_detectProgramMessageUnit(scpi_parser_state_t * state, char * buffer, int len) LOCAL;

#ifdef   __cplusplus
}