Fix 'unsafe' indentation issue in futhark-mode.el, kind of.
Fix 'unsafe' indentation issue in futhark-mode.el, kind of.

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