Defer heap variable initialisation after pledge

Otherwise `AGRS` and `program_arguments` remain allocated/unfreed in the
early (extremely unlikely) pledge(2) failure case.

Move their allocation before jq_init(), the first case of jumping to
`out` where they are cleaned up, where it also seems to logically fit
better than above between function entry, locale setup and OpenBSD
specific pledge.

src/main.c

@@ -317,8 +317,8 @@ int main(int argc, char* argv[]) {
   int last_result = -1; /* -1 = no result, 0=null or false, 1=true */
   int badwrite;
   int options = 0;
-  jv ARGS = jv_array(); /* positional arguments */
-  jv program_arguments = jv_object(); /* named arguments */
+  jv ARGS;
+  jv program_arguments;
 
 #ifdef HAVE_SETLOCALE
   (void) setlocale(LC_ALL, "");
@@ -341,6 +341,9 @@ int main(int argc, char* argv[]) {
 
   if (argc) progname = argv[0];
 
+  ARGS = jv_array();
+  program_arguments = jv_object();
+
   jq = jq_init();
   if (jq == NULL) {
     perror("malloc");