skinning example is bad at skinning

input: running `make` in the example directory

`cc -std=c99 -pedantic -O2 -o bin/skinning skinning.c -lglfw -lGL -lm -lGLU -lGLEW`

output:


Start in the example directory with skinning.c and reproduce the reported make command. Inspect the generated bin/skinning output against the attached screenshot; done means the skinning example renders correctly, though the issue does not specify the expected appearance or a test command.

Written by the indexing model from the issue text.