Symbols: resize the syms array when removing NoSymbolHEADmaster

On OpenBSD, with malloc_conf=S, the recallocarray() code detects a
size mismatch in ResizeKeyGroup when numLevels[group] doesn't match
the allocated size of syms[group].

Should fix https://gitlab.freedesktop.org/xorg/app/xkbcomp/-/issues/25

Signed-off-by: Matthieu Herrb <matthieu@herrb.eu>
Part-of: <https://gitlab.freedesktop.org/xorg/app/xkbcomp/-/merge_requests/24>

1 files changed, 3 insertions, 0 deletions

diff --git a/symbols.c b/symbols.c
index 69cbe32..55dc197 100644
--- a/symbols.c
+++ b/symbols.c
@@ -957,6 +957,9 @@ AddSymbolsToKey(KeyInfo *key, XkbDescPtr xkb, const char *field,
     for (int i = key->numLevels[ndx] - 1;
          (i >= 0) && (key->syms[ndx][i] == NoSymbol); i--)
     {
+        key->syms[ndx] = recallocarray(key->syms[ndx], key->numLevels[ndx],
+                                       key->numLevels[ndx]-1, sizeof(KeySym));
+        /* XXX resize keys->acts too ? */
         key->numLevels[ndx]--;
     }
     return True;