- pkg-configuration: fix backward compatibility

package/pkg-configuration.mk

@@ -16,20 +16,30 @@ BS_PACKAGE_NEUTRINO_AUDIODEC_FFMPEG ?= y
 
 # neutrino: omdb api key
 BS_PACKAGE_NEUTRINO_OMDB_API_KEY ?= $(NEUTRINO_OMDB_API_KEY)
-BS_PACKAGE_NEUTRINO_OMDB_API_KEY ?= 20711f9e
+ifeq ($(BS_PACKAGE_NEUTRINO_OMDB_API_KEY),$(empty))
+BS_PACKAGE_NEUTRINO_OMDB_API_KEY = 20711f9e
+endif
 
 # neutrino: shoutcast api key
 BS_PACKAGE_NEUTRINO_SHOUTCAST_DEV_KEY ?= $(NEUTRINO_SHOUTCAST_DEV_KEY)
-BS_PACKAGE_NEUTRINO_SHOUTCAST_DEV_KEY ?= fa1669MuiRPorUBw
+ifeq ($(BS_PACKAGE_NEUTRINO_SHOUTCAST_DEV_KEY),$(empty))
+BS_PACKAGE_NEUTRINO_SHOUTCAST_DEV_KEY = fa1669MuiRPorUBw
+endif
 
 # neutrino: tmdb api key
 BS_PACKAGE_NEUTRINO_TMDB_DEV_KEY ?= $(NEUTRINO_TMDB_DEV_KEY)
-BS_PACKAGE_NEUTRINO_TMDB_DEV_KEY ?= 7270f1b571c4ecbb5b204ddb7f8939b1
+ifeq ($(BS_PACKAGE_NEUTRINO_TMDB_DEV_KEY),$(empty))
+BS_PACKAGE_NEUTRINO_TMDB_DEV_KEY = 7270f1b571c4ecbb5b204ddb7f8939b1
+endif
 
 # neutrino: youtube api key
 BS_PACKAGE_NEUTRINO_YOUTUBE_DEV_KEY ?= $(NEUTRINO_YOUTUBE_DEV_KEY)
-BS_PACKAGE_NEUTRINO_YOUTUBE_DEV_KEY ?= AIzaSyBLdZe7M3rpNMZqSj-3IEvjbb2hATWJIdM
+ifeq ($(BS_PACKAGE_NEUTRINO_YOUTUBE_DEV_KEY),$(empty))
+BS_PACKAGE_NEUTRINO_YOUTUBE_DEV_KEY = AIzaSyBLdZe7M3rpNMZqSj-3IEvjbb2hATWJIdM
+endif
 
 # neutrino: weather api key
 BS_PACKAGE_NEUTRINO_WEATHER_DEV_KEY ?= $(NEUTRINO_WEATHER_DEV_KEY)
-BS_PACKAGE_NEUTRINO_WEATHER_DEV_KEY ?=
+ifeq ($(BS_PACKAGE_NEUTRINO_WEATHER_DEV_KEY),$(empty))
+BS_PACKAGE_NEUTRINO_WEATHER_DEV_KEY =
+endif