GLFW: memory leak fix, closes inviwo/inviwo-dev#426
GLFW: memory leak fix, closes inviwo/inviwo-dev#426


inviwo/inviwo,Sparkier/inviwo,inviwo/inviwo,Sparkier/inviwo,inviwo/inviwo,inviwo/inviwo,inviwo/inviwo,inviwo/inviwo,Sparkier/inviwo,Sparkier/inviwo,Sparkier/inviwo