More paranoid input parsing in generated C code.
More paranoid input parsing in generated C code.

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