g_param_get_*() changes

[Tim Janik <timj gtk org>]

i just noticed, that g_param_get_nick, g_param_get_name, and g_param_get_blurb
are inconsistent with the rest of the GParamSpec API, so i'm about to commit
the following fix:

        * gparam.[hc]: s/g_param_get/g_param_spec_get/ for get_nick,
        get_name and get_blurb, to be consistent with the rest of the
        g_param_spec_*() functions.

aparently, only beast and gtk+/tests/prop-editor.c seem to use these
functions currently.

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ciaoTJ