Permit zip/zipWith with only one array.
Permit zip/zipWith with only one array.

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