fix(_udevcmd): protect against localvar_inherit

Author: akinomyoga

completions/_udevadm

@@ -8,7 +8,7 @@ _comp_cmd_udevadm()
     local cur prev words cword was_split comp_args
     _comp_initialize -s -- "$@" || return
 
-    local i udevcmd has_udevcmd=""
+    local i udevcmd="" has_udevcmd=""
     for ((i = 1; i < cword; i++)); do
         if [[ ${words[i]} != -* ]]; then
             udevcmd=${words[i]}