check key for NULL dereference, just in case - svkbd - simple virtual keyboard
 (HTM) git clone git://git.suckless.org/svkbd
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       ---
 (DIR) commit 81c96cec89dd280cab71170f50b9c088476d263c
 (DIR) parent fd0132256402069a3f045d677f53cc2a1b5340e2
 (HTM) Author: Hiltjo Posthuma <hiltjo@codemadness.org>
       Date:   Sat,  3 Jul 2021 11:44:18 +0200
       
       check key for NULL dereference, just in case
       
       This matches the check pattern in other parts of the code.
       
       Diffstat:
         M svkbd.c                             |       3 ++-
       
       1 file changed, 2 insertions(+), 1 deletion(-)
       ---
 (DIR) diff --git a/svkbd.c b/svkbd.c
       @@ -643,7 +643,8 @@ unpress(Key *k, KeySym buttonmod)
                        }
                }
        
       -        if (enableoverlays && currentoverlay != -1 && !IsModifierKey(k->keysym)) {
       +        if (enableoverlays && currentoverlay != -1 &&
       +            (k == NULL || !IsModifierKey(k->keysym))) {
                        if (releaseprotect) {
                                releaseprotect = 0;
                        } else {