ajax.js:httpData patch for failing JSON eval()

[robman]

BUG: httpData: function in ajax.js (used by getJSON() calls or get() calls where type == "json") doesn't currently test the eval is successful.

e.g. it just assumes that valid JSON was returned and eval will succeed, silently failing if this is the case.

FIX: Here's a patch to bring it in line with the other functions above.

e.g. httpSuccess and httpNotModified

NOTE: Let me know if there's a more "preferred" way to handle this error

DIFF against 1.2.6 from svn: see attached patch file

[robman]

DIFF against 1.2.6 from svn

[Rick Waldron]

This issue is not valid as jQuery no longer uses eval for JSON parsing.