Fix the pointer initialization

If the overwriteStruct() finds an uninitialized pointer, it tries to initialize it,
but does it incorrectly. It tries to assign a pointer to pointer, instead of pointer.

Signed-off-by: Gladkov Alexey <agladkov@redhat.com>

configuration/parser.go

@@ -220,7 +220,7 @@ func (p *Parser) overwriteStruct(v reflect.Value, fullpath string, path []string
 		}
 	case reflect.Ptr:
 		if field.IsNil() {
-			field.Set(reflect.New(sf.Type))
+			field.Set(reflect.New(field.Type().Elem()))
 		}
 	}