On a 64 bit host, sparse says:

timeval.c:148:15: warning: constant 0x7fffffffffffffff is so big it is long
timeval.c:149:12: warning: constant 0x7fffffffffffffff is so big it is long

so let's use long constant types in order to prevent undesired overflow
failures.

Signed-off-by: Martin Kepplinger <martink_at_posteo.de>

---
 lib/timeval.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/timeval.c b/lib/timeval.c
index 1012b4e39..87654f398 100644
--- a/lib/timeval.c
+++ b/lib/timeval.c
@@ -145,8 +145,8 @@ time_t Curl_tvdiff_us(struct timeval newer, struct timeval older)
     return 0x7fffffff;
 #else
   /* for 64bit time_t systems */
-  if(diff >= (0x7fffffffffffffff/1000000))
-    return 0x7fffffffffffffff;
+  if(diff >= (0x7fffffffffffffffUL/1000000))
+    return 0x7fffffffffffffffUL;
 #endif
   return (newer.tv_sec-older.tv_sec)*1000000+
     (time_t)(newer.tv_usec-older.tv_usec);
-- 
2.11.0
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