scratch/igc 6eecf9e9a63 4/4: Fix compilation warning

[Pip Cet]

branch: scratch/igc
commit 6eecf9e9a63c9bb72bbcc6a8c7a9190e17227c55
Author: Pip Cet <pipcet@protonmail.com>
Commit: Pip Cet <pipcet@protonmail.com>

    Fix compilation warning
    
    * src/igc.c (igc_xpalloc_exact): Cast function pointer to avoid
    compilation warning.
---
 src/igc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/igc.c b/src/igc.c
index 2cdf884f4ee..09dffcba574 100644
--- a/src/igc.c
+++ b/src/igc.c
@@ -3014,8 +3014,8 @@ igc_xpalloc_exact (void **pa_cell, ptrdiff_t *nitems,
     destroy_root_with_start (pa);
     pa = xpalloc (pa, nitems, nitems_incr_min, nitems_max, item_size);
     char *end = (char *)pa + *nitems * item_size;
-    root_create (global_igc, pa, end, mps_rank_exact (), scan_area, closure,
-                false, "xpalloc-exact");
+    root_create (global_igc, pa, end, mps_rank_exact (), (mps_area_scan_t) 
scan_area,
+                closure, false, "xpalloc-exact");
     *pa_cell = pa;
   }
 }