npc(1): improves program_name resolution

src/npc.c

@@ -36,9 +36,10 @@ int main(int argc, char *argv[]) {
 	int c;
 	char showend = 0; /* print a dollar sign before each newline */
 	char showtab = 0; /* prints tab characters in caret notation */
-	program_name = (argv[0] == NULL ? program_name : argv[0]);
 
 	if (argc > 0) {
+		program_name = argv[0];
+
 		while ((c = getopt(argc, argv, "et")) != -1) {
 			switch (c){
 				case 'e': showend = 1; break;