Fix a compilation problem with --minimum

For https://bugzilla.gnome.org/show_bug.cgi?id=636750
Moved a #endif /* LIBXML_OUTPUT_ENABLED */ a few lines down
to avoid reference an undefined variable
diff --git a/xmllint.c b/xmllint.c
index 3ca8077..40a2194 100644
--- a/xmllint.c
+++ b/xmllint.c
@@ -3365,11 +3365,11 @@
 	     i++;
 #ifdef LIBXML_OUTPUT_ENABLED
 	     format = atoi(argv[i]);
-#endif /* LIBXML_OUTPUT_ENABLED */
 	     if (format == 1) {
 	         noblanks++;
 	         xmlKeepBlanksDefault(0);
 	     }
+#endif /* LIBXML_OUTPUT_ENABLED */
 	}
 #ifdef LIBXML_READER_ENABLED
 	else if ((!strcmp(argv[i], "-stream")) ||