Null input to http_build_query in http.php

[johnhennmacc]

With r8534, I get an error message like the following:

Warning: http_build_query() [function.http-build-query]: Parameter 1 expected to be Array or Object. Incorrect value given. in [blog path removed]/wp-includes/http.php on line 200

Removing the call to http_build_query removes the message but might have other side effects that I may not know about.

[anonymized_218323]

Tests for whether $body is an array or an object before running http_build_query() on $body. Based off of r8535

[anonymized_218323]

See also #4779.

[ryan]

(In [8536]) Tests for whether is an array or an object before running http_build_query() on . Props santosj. fixes #7460 see #4779