Fixed two problems in 'Insert Call to Parent'

[aurora]

My commits fix two problems, eg in the following example

class test{
    /**
     * ...
     * @param $parent[tab-trigger]
     */
    function test() {
    }
}

the replacement after tab-trigger for parent would have been:

class test{
    /**
     * ...
     * @param $
     */
    function test() {
    }
}
parent

which is of course wrong. The incorred placement is the fault of returning 'TM_EXIT_INSERT_TEXT' (203), i've removed this with my first commit. The second commit fixes the problem, that tab-expansion should not occur when tab is pressed after writing for example a variable named '$parent', by checking contents of 'TM_CURRENT_WORD'. Replacement should only be done, if this environment variable is empty.

[infininight]

Pulled as 518b8b0 & 792be2b thanks!