Fix clang warnings, add clang to travis

Jan Breuer

2015-10-04 df3eeb1a9be519b5eaef18b8f7c2d7a201bf7b97

 libscpi/test/test_parser.c

@@ -95,6 +95,7 @@
    memcpy(output_buffer + output_buffer_pos, data, len);
    output_buffer_pos += len;
    output_buffer[output_buffer_pos] = '\0';
    return len;
}

scpi_t scpi_context;
@@ -120,6 +121,8 @@
}

static scpi_result_t SCPI_Flush(scpi_t * context) {
    (void) context;

    return SCPI_RES_OK;
}

@@ -133,6 +136,8 @@

scpi_reg_val_t srq_val = 0;
static scpi_result_t SCPI_Control(scpi_t * context, scpi_ctrl_name_t ctrl, scpi_reg_val_t val) {
    (void) context;

    if (SCPI_CTRL_SRQ == ctrl) {
        srq_val = val;
    } else {
@@ -144,6 +149,8 @@
scpi_bool_t RST_executed = FALSE;

static scpi_result_t SCPI_Reset(scpi_t * context) {
    (void) context;

    RST_executed = TRUE;
    return SCPI_RES_OK;
}
@@ -550,6 +557,7 @@
    errCode = SCPI_ErrorPop(&scpi_context);                                             \
    CU_ASSERT_EQUAL(result2, expected_result);                                          \
    if (expected_result == SCPI_EXPR_OK) {                                              \
        CU_ASSERT_EQUAL(val_dimensions, expected_dimensions);                           \
        CU_ASSERT_EQUAL(val_range, expected_range);                                     \
        { size_t i; for(i = 0; (i < val_len) && (i < val_dimensions); i++) {            \
            CU_ASSERT_EQUAL(val_from[i], expected_from[i]);                             \