Fix static analysis failures

src/freedombone-tests

         # for each expected interface function
         for f in "${interface_functions[@]}"
         do
-            test_app_function_type ${filename} "$f"
+            test_app_function_type "${filename}" "$f"
         done
     done
 }
 fix_stig
 test_stig
 
-if [ ! $RUN_STIG ]; then
+if [ ! "$RUN_STIG" ]; then
     echo $'All tests passed'
 fi