Re: emacs-26 build breaking on RHEL 6.6 GTK2

[martin rudalics]

> *sigh* too many combinations to test. [1]

One more:

../../src/xfns.c: In function ‘Fx_display_monitor_attributes_list’:
../../src/xfns.c:4993:7: warning: implicit declaration of function 
‘gdk_screen_get_monitor_scale_factor’ [-Wimplicit-function-declaration]
../../src/xfns.c:4993:7: warning: nested extern declaration of 
‘gdk_screen_get_monitor_scale_factor’ [-Wnested-externs]

Here with GTK+ Version 3.4.2.

Sorry.  I must have compiled the wrong branch when testing this.

martin