Fix alloc_realloc UB

 void ** does not exist: the address of a generic pointer is not
properly defined (different pointer types may have different
representations). So, alloc_realloc cannot exist as is without UB.
Fortunately, it's not supposed to be used in the skalibs programming
style, and skalibs itself only uses it in two places
(stralloc_ready_tuned and stralloc_shrink) where the pointer is a
char *.
 So we just fix the UB by making alloc_realloc() take a char **,
and it's only defined for that pointer type.
 Nothing to see here folks, nothing happened at all.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libstddjb/stralloc_shrink.c b/src/libstddjb/stralloc_shrink.c
index a372084..0dceca2 100644
--- a/src/libstddjb/stralloc_shrink.c
+++ b/src/libstddjb/stralloc_shrink.c
@@ -7,7 +7,7 @@ int stralloc_shrink (stralloc *sa)
 {
   if (sa->a > sa->len)
   {
-    if (!alloc_re((void **)&sa->s, sa->a, sa->len)) return 0 ;
+    if (!alloc_re(&sa->s, sa->a, sa->len)) return 0 ;
     sa->a = sa->len ;
   }
   return 1 ;