(Reuters) - Singer Robin Gibb, a founding member of the disco-era hit machine the Bee Gees, is in a coma surrounded by members of his family in a London hospital, British media reported on Saturday. A spokesman for the 62-year-old, who has been battling cancer and recently contracted pneumonia, was not immediately available to comment on the reports. "Our prayers are with Robin," an unnamed family friend told the Sun newspaper, which first reported the news. "He has kept so positive and always believed he could beat this. Sadly, it looks like he has developed pneumonia, which is very bad...