fix: flags detail page crash if reporter blocks author

Fixed an issue where the flags detail page would crash if the
reporting user flagged a post and then proceeded to block the
post author.

Retrieval of a flag's target data should be irrespective of
block status.

fixes #6925

src/flags.js

@@ -90,7 +90,7 @@ Flags.get = function (flagId, callback) {
 			// Second stage
 			async.parallel({
 				userObj: async.apply(user.getUserFields, data.base.uid, ['username', 'userslug', 'picture', 'reputation']),
-				targetObj: async.apply(Flags.getTarget, data.base.type, data.base.targetId, data.base.uid),
+				targetObj: async.apply(Flags.getTarget, data.base.type, data.base.targetId, 0),
 			}, function (err, payload) {
 				// Final object return construction
 				next(err, Object.assign(data.base, {