fix

Author: petronny

raspi-config

@@ -1551,7 +1551,7 @@ do_gldriver() {
     return 1
   fi
   for package in gldriver-test libgl1-mesa-dri; do
-    if ! is_installed $package; then
+    if ! is_installed "$package"; then
       missing_packages="$package $missing_packages"
     fi
   done