bug#20727: 24.5; Font fallback doesn't work for the Emoji range

[Glenn Morris]

Using the unpleasant example character from the initial report, here are
what seem to be the relevant font-log entries:


(open "-unknown-DejaVu Sans 
Mono-normal-normal-normal-*-m-0-iso10646-1:script=symbol" "xft:-unknown-DejaVu 
Sans Mono-normal-normal-normal-*-13-*-m-0-iso10646-1")
 (sort-by "-*-normal-normal-normal-*-13-*" "xft:-unknown-DejaVu Sans 
Mono-normal-normal-normal-*-m-0-iso10646-1")
 (list "-unknown-DejaVu Sans Mono-*-i-isoso1010646-1:script=symbol"
       ["-unknown-DejaVu Sans Mono-normal-normal-normal-*-m-0-iso10646-1" 
"-unknown-DejaVu Sans Mono-bold-oblique-normal-*-m-0-isoso1010646-1" 
"-unknown-DejaVu Sans Mono-bold-normal-normal-*-m-0-isoso1010646-1" 
"-unknown-DejaVu Sans Mono-normal-oblique-normal-*-m-0-iso10646-1" 
"-unknown-DejaVu Sans Mono-normal-oblique-normal-*-m-0-iso10646-1" 
"-unknown-DejaVu Sans Mono-bold-normal-normal-*-m-0-isoso1010646-1" 
"-unknown-DejaVu Sans Mono-bold-oblique-normal-*-m-0-isoso1010646-1" 
"-unknown-DejaVu Sans Mono-normal-normal-normal-*-m-0-iso10646-1"])
 (xfont-list "-unknown-DejaVu Sans Mono-*-*-*-*-*-*-*-*-*-*-iso10646-1" nil)
 (ftfont-list "-unknown-DejaVu Sans Mono-*-iso10646-1:script=symbol"
              ("-unknown-DejaVu Sans 
Mono-normal-normal-normal-*-m-0-iso10646-1" "-unknown-DejaVu Sans 
Mono-bold-oblique-normal-*-m-0-isoso1010646-1" "-unknown-DejaVu Sans 
Mono-bold-normal-normal-*-m-0-isoso1010646-1" "-unknown-DejaVu Sans 
Mono-normal-oblique-normal-*-m-0-iso10646-1" "-unknown-DejaVu Sans 
Mono-normal-oblique-normal-*-m-0-iso10646-1" "-unknown-DejaVu Sans 
Mono-bold-normal-normal-*-m-0-isoso1010646-1" "-unknown-DejaVu Sans 
Mono-bold-oblique-normal-*-m-0-isoso1010646-1" "-unknown-DejaVu Sans 
Mono-normal-normal-normal-*-m-0-iso10646-1"))
 (default\ fontset:\ font\ for 128169 nil)