Fix crashes on TTY frames due to "C-x 6 f"

Fix crashes on TTY frames due to "C-x 6 f"

* src/xdisp.c (redisplay_internal): Revert the recent change
regarding TTY frames' garbaged flag.  It is not needed.

* src/dispnew.c (adjust_frame_glyphs_for_frame_redisplay):
When returning due to mismatch between the desired and actual
dimensions of the glyph matrix, set the frame's garbaged flag
for TTY frames.  This avoids crashes when we are later called
from redisplay.  Reported by Ergus <spacibba@aol.com>.