render/egl: fix zero-length VLA
UBSan says:
../render/egl.c:370:10: runtime error: variable length array bound evaluates to non-positive value 0Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
UBSan says:
../render/egl.c:370:10: runtime error: variable length array bound evaluates to non-positive value 0