Fix for single-dimension arrays in blankValue.
Fix for single-dimension arrays in blankValue.

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