gst-play.c depends on libm due to using `round`. Passing by, correct identation of `gst_tools` definition. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7492>
gst-play.c depends on libm due to using `round`. Passing by, correct identation of `gst_tools` definition. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7492>