Fix prompts asking for 'I' in Turkish locales.

They have I<->ı and İ<->i.

Fortunately, people are quite unlikely to type capital letters in response
to prompts, perhaps save for the stat gain one.

1 files changed, 5 insertions, 0 deletions

diff --git a/crawl-ref/source/libutil.h b/crawl-ref/source/libutil.h
index 6987eedf51..5b810e5c0c 100644
--- a/crawl-ref/source/libutil.h
+++ b/crawl-ref/source/libutil.h
@@ -65,6 +65,11 @@ static inline bool isaalnum(int c)
     return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9');
 }
 
+static inline ucs_t toalower(ucs_t c)
+{
+    return isaupper(c) ? c + 'a' - 'A' : c;
+}
+
 int numcmp(const char *a, const char *b, int limit = 0);
 bool numcmpstr(string a, string b);
 size_t strlcpy(char *dst, const char *src, size_t n);