Patch by sdaau on IRC. Thanks!

This reverts commit b257e011.

Conflicts:

	ChangeLog

This reverts commit b6a1cff6.

Only if a previously selected item (mouse over, keyboard) is available
though.

This reverts commit 8b79bc33.

This fixes a segfault in --reload when the image becomes unloadable while feh
is running.

Note that this does not affect --reload with more than one file: If the
current image is removed, feh will simply jump to the next image. feh will
only quit if the file still exists, but can no longer be loaded.

* remove unused variable Im1 in filelist.c
* options are initialised as 0, so only explicitly set those to 0 for which it
  makes sense because of their context
* Make a few warnings about wrong option combinations fatal

An action may be used to alter the image or specific parts of it displayed by
--info, so if a user invokes an action with hold_action set, the image and all
relevant information must be reloaded.

In the image_remove function, slideshow_change_image needs to be called before
removing the image from the filelist.  Because of this, the "x of y" displayed
by --draw-filename is wrong (y is 1 too high).

This commit introduces a new 'render' argument to slideshow_chingae_image.
The image_remove function calls it with render=0, edits the filelist and then
runs by winwidget_render_image itself.

Patch by Yu-Jie Lin.

Signed-off-by: Yu-Jie Lin <livibetter@gmail.com>

A page is the window width or height.

Signed-off-by: Yu-Jie Lin <livibetter@gmail.com>