Tidying function checking utils

src/freedombone-utils-depends

 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 function function_check {
-    if [ ! "$(type ${1} 2>/dev/null)" ]; then
+    if [ ! "$(type "${1}" 2>/dev/null)" ]; then
         echo $"Dependency error: The function ${1} has not been defined"
         exit 72528
     fi
 }
 
 function function_exists {
-    if [ ! "$(type ${1} 2>/dev/null)" ]; then
+    if [ ! "$(type "${1}" 2>/dev/null)" ]; then
         echo "0"
     else
         echo "1"