Remove dubious condition on scriptlet exec()

The check used to make some sense back in rpm < 4.12 where xx depended
on rpm_execcon() result, but even there it was only meaningful when
SELinux was enabled. It would seem to make sense to simply remove the
dubious check entirely.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

lib/rpmscript.c

@@ -219,9 +219,7 @@ static void doScriptExec(ARGV_const_t argv, ARGV_const_t prefixes,
 	/* XXX Don't mtrace into children. */
 	unsetenv("MALLOC_CHECK_");
 
-	if (xx == 0) {
-	    xx = execv(argv[0], argv);
-	}
+	xx = execv(argv[0], argv);
     }
     _exit(127); /* exit 127 for compatibility with bash(1) */
 }