Fixed missing peekchar() for IOStream::Filter.
Fixed missing peekchar() for IOStream::Filter.

kc9jud/Cosa,dansut/Cosa,rrobinet/Cosa,SinishaDjukic/Meshwork,SinishaDjukic/Meshwork,dansut/Cosa,mikaelpatel/Cosa,jeditekunum/Cosa,SinishaDjukic/Meshwork,kc9jud/Cosa,dansut/Cosa,dansut/Cosa,rrobinet/Cosa,mikaelpatel/Cosa,kc9jud/Cosa,jeditekunum/Cosa,kc9jud/Cosa,rrobinet/Cosa,SinishaDjukic/Meshwork,jeditekunum/Cosa,rrobinet/Cosa,mikaelpatel/Cosa,jeditekunum/Cosa,mikaelpatel/Cosa