[glib: 24/25] Fixing signedness warning in glib/gslice.c

[Philip Withnall <pwithnall src gnome org>]

commit fad04d2e18832106ecb4b9f04ae3bfdbcacc9053
Author: Emmanuel Fleury <emmanuel fleury u-bordeaux fr>
Date:   Sat Feb 23 09:56:57 2019 +0100

    Fixing signedness warning in glib/gslice.c
    
    In file included from glib/glibconfig.h:9,
                     from glib/gslice.c:20:
    glib/gslice.c: In function ‘magazine_cache_trim’:
    glib/gmacros.h:354:25: error: comparison of unsigned expression < 0 is always false [-Werror=type-limits]
     #define ABS(a)    (((a) < 0) ? -(a) : (a))
                             ^
    glib/gslice.c:643:10: note: in expansion of macro ‘ABS’
       while (ABS (stamp - magazine_chain_uint_stamp (current)) >= allocator->config.working_set_msecs)
              ^~~

 glib/gslice.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/glib/gslice.c b/glib/gslice.c
index 86e76cec0..b192ba7f1 100644
--- a/glib/gslice.c
+++ b/glib/gslice.c
@@ -640,7 +640,10 @@ magazine_cache_trim (Allocator *allocator,
   /* trim magazine cache from tail */
   ChunkLink *current = magazine_chain_prev (allocator->magazines[ix]);
   ChunkLink *trash = NULL;
-  while (ABS (stamp - magazine_chain_uint_stamp (current)) >= allocator->config.working_set_msecs)
+  while ((stamp >= magazine_chain_uint_stamp (current) &&
+          stamp - magazine_chain_uint_stamp (current) >= allocator->config.working_set_msecs) ||
+         (stamp <= magazine_chain_uint_stamp (current) &&
+          magazine_chain_uint_stamp (current) - stamp >= allocator->config.working_set_msecs))
     {
       /* unlink */
       ChunkLink *prev = magazine_chain_prev (current);