in example 10.glsl number 11.geometry i get the following error: [glsl_program]: Info_log: [glsl_program]: ERROR: Too many geometry output components [glsl_program]: Link failed! this is with GEM: ver: 0.93.3 GEM: compiled: Nov 10 2011 on OS X 10.7 AMD Radeon HD 6490M what's to blame? max