Fix #103 semicolon with empty command causes problems

Jan Breuer

2018-09-05 2e78fdc66afab833fdbba16dd12f0e69df54700c

 libscpi/src/parser.c

@@ -340,7 +340,8 @@
                context->buffer.position -= totcmdlen;
                totcmdlen = 0;
            } else {
                if (context->parser_state.programHeader.type == SCPI_TOKEN_UNKNOWN) break;
                if (context->parser_state.programHeader.type == SCPI_TOKEN_UNKNOWN
                        && context->parser_state.termination == SCPI_MESSAGE_TERMINATION_NONE) break;
                if (totcmdlen >= context->buffer.position) break;
            }
        }