Blender Git Loki

fix Collada: wrong usage of pointer and hidden redeclaration

* Suspicious usage of pointer:

short *type = 0; // this creates a null pointer

When this is later used for anything then blender would crash.
After following the code and check what happens i strongly believe
the author wanted to use a short and not a pointer to a short here.

* local variable where reused later in same function
While this did no harm, i still felt it was better to use a different
name here to make things more separated:

- moved variable declaraiotns into loop (for int a=0; ...)
- renamed uv_images to uv_image_set
- renamed index variable from i to j in inner loop that
reused same index name from outer loop