init_var()

I made an init_var function that matches the init_pref function, only
for runtime variables.

libsaria/__init__.py

@@ -47,6 +47,11 @@ def init_pref(key, value):
 	if prefs.get(key, None) == None:
 		prefs[key] = value
 
+def init_var(key, value):
+	global vars
+	if vars.get(key, None) == None:
+		vars[key] = value
+
 
 def startup():
 	global plugin