Can't avoid words wrapping in YAML dumps

[yblake]

The $wordwrap parameter of dump function is documented : "Pass in 0 for no wordwrap, false for default(40)"

When you give this parameter a value of 0, you should expect no word wrap.

But the dumper use default value of 40.

The mistake is at line 239. The condition empty($wordwrap) returns true for $wordwrap value 0,; which lead to apply the default settings of 40.

The fix is to replace this first part of the condition by !isset($wordwrap); this will allow $this->_dumpWordWrap to be 0.