Plug two resource leaks.

CID: 92077, 92074

usr.bin/rpcgen/rpc_parse.c

@@ -93,6 +93,7 @@ get_definition(void)
 		def_const(defp);
 		break;
 	case TOK_EOF:
+		free(defp);
 		return (NULL);
 	default:
 		error("definition keyword expected");

usr.bin/rpcgen/rpc_scan.c

@@ -490,6 +490,7 @@ docppline(char *line, int *lineno, const char **fname)
 	*p = 0;
 	if (*file == 0) {
 		*fname = NULL;
+		free(file);
 	} else {
 		*fname = file;
 	}