[PATCH] i18n: Set LC_COLLATE locale category based on system locale.

[Ben Pfaff]

LC_COLLATE controls the sort order of file names in GTK+ file
chooser dialog boxes, so we should set this locale category so as
to honor the user's preferences.

In the standard C library, only a few functions honor LC_COLLATE:
strcoll, wcscoll, strxfm, and wcsxfrm.  PSPP doesn't use any of
these functions, so this commit should not affect PSPP's use of
standard library functions.

The libunistring manual only mentions collation rules in the entries
for a few functions: u8_strcoll, u16_strcoll, u32_strcoll,
u8_normcoll, u16_normcoll, u32_normcoll, u8_casecoll, u16_casecoll
u32_casecoll.  PSPP doesn't use any of those functions either.

Reported by "ajk-eis" <address@hidden>.
---
 src/libpspp/i18n.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/src/libpspp/i18n.c b/src/libpspp/i18n.c
index 5ec3960..0819299 100644
--- a/src/libpspp/i18n.c
+++ b/src/libpspp/i18n.c
@@ -546,6 +546,7 @@ void
 i18n_init (void)
 {
   setlocale (LC_CTYPE, "");
+  setlocale (LC_COLLATE, "");
   setlocale (LC_MESSAGES, "");
 #if HAVE_LC_PAPER
   setlocale (LC_PAPER, "");
-- 
1.7.2.5