v1.2.14

Release v1.2.14

Core
 - Release v1.2.14
 - github: actions - create initial build.yaml
Digigram Echo Mixer
 - echomixer: fix various gcc warnings
Digigram PCXHR Loader
 - pcxhrloader: fix gcc warnings (string truncation)
Envy24 Control
 - envy24control: port to GTK 3
 - envy24control: fix GtkSpinButton runtime warnings
 - envy24control: fix memory access errors in profiles
 - envy24control: fix file descriptor leaks in profiles
 - envy24control: fix crash when using system profiles file
 - envy24control: fix control callback for spdif output
 - envy24control: simplify code by using gtk_widget_show_all
 - envy24control: fix spdif output settings
 - envy24control: fix cast warnings and string array overflows
HDA Jack Retask
 - hdajackretask: fix reset_changes_boot() declaration
 - hdajackretask: Fix build with gcc7
RME Digi Control
 - rmedigicontrol: fix gcc warnings (string size)
as10k1 (EMU10K1+ DSP Assembler)
 - as10k1: fix gcc warnings
hdspconf
 - hdspconf: fix gcc warnings (const)
hdspmixer
 - hdspmixer: correct string delimiter in labels_aio_ss_input
ld10k1 (EMU10K1+ DSP Code Loader)
 - ld10k1: fix various gcc warnings
mixartloader
 - mixartloader: fix gcc warnings (string truncation)
usx2yloader
 - usx2yloader: fix gcc warnings (string size)
vxloader
 - vxloader: fix gcc warnings (string size)

Signed-off-by: Jaroslav Kysela <perex@perex.cz>