parse_keysym: handle possible NULL return from copy_to_scratch()HEADmaster

Handles report from gcc 15.1:

handle.c: In function ‘parse_keysym’:
handle.c:333:10: warning: use of NULL ‘tmpname’ where non-null expected
 [CWE-476] [-Wanalyzer-null-argument]
  333 |     if (!strcmp(*name, "NoSymbol")) {
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Part-of: <https://gitlab.freedesktop.org/xorg/app/xmodmap/-/merge_requests/10>

1 files changed, 2 insertions, 0 deletions

diff --git a/handle.c b/handle.c
index a8894e6..524650f 100644
--- a/handle.c
+++ b/handle.c
@@ -330,6 +330,8 @@ static Bool
 parse_keysym(const char *line, int n, char **name, KeySym *keysym)
 {
     *name = copy_to_scratch (line, n);
+    if (*name == NULL)
+	return (False);
     if (!strcmp(*name, "NoSymbol")) {
 	*keysym = NoSymbol;
 	return (True);