* xsettings.c (apply_xft_settings): Fix potential buffer overrun.
This is unlikely, but can occur if DPI is outlandish.
+ * xsettings.c (Ffont_get_system_normal_font, Ffont_get_system_font):
* xselect.c (Fx_get_atom_name): Avoid need for strlen.
* xrdb.c: Don't assume strlen fits in int; avoid some strlens.