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Diffstat (limited to 'src/emu/validity.c')
-rw-r--r--src/emu/validity.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/src/emu/validity.c b/src/emu/validity.c
index f790755a30f..83517646af8 100644
--- a/src/emu/validity.c
+++ b/src/emu/validity.c
@@ -176,7 +176,7 @@ INLINE int validate_tag(const game_driver *driver, const char *object, const cha
for (p = tag; *p != 0; p++)
{
- if (*p != tolower(*p))
+ if (*p != tolower((UINT8)*p))
{
mame_printf_error("%s: %s has %s with tag '%s' containing upper-case characters\n", driver->source_file, driver->name, object, tag);
error = TRUE;
@@ -532,7 +532,7 @@ static int validate_driver(int drivnum, const machine_config *config)
/* make sure the year is only digits, '?' or '+' */
for (s = driver->year; *s; s++)
- if (!isdigit(*s) && *s != '?' && *s != '+')
+ if (!isdigit((UINT8)*s) && *s != '?' && *s != '+')
{
mame_printf_error("%s: %s has an invalid year '%s'\n", driver->source_file, driver->name, driver->year);
error = TRUE;
@@ -702,7 +702,7 @@ static int validate_roms(int drivnum, const machine_config *config, region_info
/* make sure it's all lowercase */
for (s = last_name; *s; s++)
- if (tolower(*s) != *s)
+ if (tolower((UINT8)*s) != *s)
{
mame_printf_error("%s: %s has upper case ROM name %s\n", driver->source_file, driver->name, last_name);
error = TRUE;