Fixed little bug in fg2dot.cpp
Fixed little bug in fg2dot.cpp

eriqande/libDAI-mods,tttamaki/libdai,yesimon/libDAI,flurischt/libDAI,fivejjs/libDAI,eriqande/libDAI-mods,AndrewNguyenF3/libdai,AndrewNguyenF3/libdai,dbtsai/libDAI,eriqande/libDAI-mods,AndrewNguyenF3/libdai,fivejjs/libDAI,dbtsai/libDAI,fivejjs/libDAI,slnovak/libDAI,midnighteuler/libdai,slnovak/libDAI,yesimon/libDAI,AndrewNguyenF3/libdai,flurischt/libDAI,midnighteuler/libdai,slnovak/libDAI,dbtsai/libDAI,slnovak/libDAI,midnighteuler/libdai,AndrewNguyenF3/libdai,tttamaki/libdai,slnovak/libDAI,midnighteuler/libdai,slnovak/libDAI,midnighteuler/libdai,midnighteuler/libdai,midnighteuler/libdai,dbtsai/libDAI,yesimon/libDAI,flurischt/libDAI,tttamaki/libdai,yesimon/libDAI,slnovak/libDAI,tttamaki/libdai,fivejjs/libDAI,eriqande/libDAI-mods,flurischt/libDAI,eriqande/libDAI-mods,flurischt/libDAI,fivejjs/libDAI,dbtsai/libDAI,yesimon/libDAI,dbtsai/libDAI,tttamaki/libdai,yesimon/libDAI,yesimon/libDAI