Fix bug in collada loader where primitives with a different number of texture coordinates would not be accounted for in the actual texture coordinate arrays, resulting in out of bounds errors and texture coordinate values at incorrect indices. To resolve, fill in bogus values after each primitive is processed to make sure all texture coordinate sets have the same size and match the number of vertices.
Fix bug in collada loader where primitives with a different number of texture coordinates would not be accounted for in the actual texture coordinate arrays, resulting in out of bounds errors and texture coordinate values at incorrect indices. To resolve, fill in bogus values after each primitive is processed to make sure all texture coordinate sets have the same size and match the number of vertices.

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