Reduced size by reordering variable declarations

Reduces `min.gz` footprint by ~19 bytes.

```
Running "compare_size:files" (compare_size) task
   raw     gz Sizes                                                            
244494  72418 dist/jquery.js                                                   
 83531  29267 dist/jquery.min.js                                               

   raw     gz Compared to master @ cc19a6bd3b6183887b52a965e77234f4dd9684ca    
   -28    -18 dist/jquery.js                                                   
    +2    -19 dist/jquery.min.js
```