Permit empty array literals.
Permit empty array literals.

HIPERFIT/futhark,ihc/futhark,diku-dk/futhark,mrakgr/futhark,ihc/futhark,diku-dk/futhark,mrakgr/futhark,diku-dk/futhark,HIPERFIT/futhark,CulpaBS/wbBach,diku-dk/futhark,HIPERFIT/futhark,diku-dk/futhark,mrakgr/futhark,ihc/futhark