Fixed crash of channel topic screen

...e/kuschku/libquassel/syncables/types/impl/IrcChannel.java

...uschku/quasseldroid_ng/ui/chat/ChannelDetailActivity.java

...src/main/java/de/kuschku/util/irc/chanmodes/ChanMode.java

...de/kuschku/util/irc/chanmodes/IrcModeProviderFactory.java

...uschku/util/irc/chanmodes/impl/BewareIrcModeProvider.java

...hku/util/irc/chanmodes/impl/CharybdisIrcModeProvider.java

...e/kuschku/util/irc/chanmodes/impl/DalIrcModeProvider.java

...uschku/util/irc/chanmodes/impl/DancerIrcModeProvider.java

...de/kuschku/util/irc/chanmodes/impl/FqIrcModeProvider.java

...uschku/util/irc/chanmodes/impl/HybridIrcModeProvider.java

...chku/util/irc/chanmodes/impl/HyperionIrcModeProvider.java

...schku/util/irc/chanmodes/impl/InspireIrcModeProvider.java

...e/kuschku/util/irc/chanmodes/impl/NeoIrcModeProvider.java

...hku/util/irc/chanmodes/impl/NightstarIrcModeProvider.java

...e/kuschku/util/irc/chanmodes/impl/RfcIrcModeProvider.java

...uschku/util/irc/chanmodes/impl/ShadowIrcModeProvider.java

...kuschku/util/irc/chanmodes/impl/SolidIrcModeProvider.java

...chku/util/irc/chanmodes/impl/UndernetIrcModeProvider.java

...uschku/util/irc/chanmodes/impl/UnrealIrcModeProvider.java

app/src/main/res/layout/activity_channel_detail.xml