Slightly nicer code for empty branches.
Slightly nicer code for empty branches.

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