Add missing initprogname() calls.

plugins/sudoers/regress/parser/check_hexchar.c

@@ -34,6 +34,7 @@
 #define SUDO_ERROR_WRAP 0
 
 #include "sudo_compat.h"
+#include "sudo_util.h"
 
 int hexchar(const char *s);
 
@@ -50,6 +51,8 @@ main(int argc, char *argv[])
     struct hexchar_test *test_data;
     int i, ntests, result, errors = 0;
 
+    initprogname(argc > 0 ? argv[0] : "check_hexchar");
+
     /* Build up test data. */
     ntests = 256 + 256 + 3;
     test_data = calloc(sizeof(*test_data), ntests);