Separate a possibly-nil element from dict init
Separate a possibly-nil element from dict init

Prevents a gotcha when adding elements after this element in one of the dict
initializers

socialize/socialize-sdk-ios,dontfallisleep/socialize-sdk-ios,socialize/socialize-sdk-ios,socialize/socialize-sdk-ios,dontfallisleep/socialize-sdk-ios,socialize/socialize-sdk-ios,socialize/socialize-sdk-ios,dontfallisleep/socialize-sdk-ios,dontfallisleep/socialize-sdk-ios,dontfallisleep/socialize-sdk-ios,dontfallisleep/socialize-sdk-ios,socialize/socialize-sdk-ios