uniform4iv method
Implementation
void uniform4iv(UniformLocation location, List<int> v){
int count = v.length;
final valuePtr = calloc<Int32>(count);
valuePtr.asTypedList(count).setAll(0, v);
gl.glUniform4iv(location.id, count ~/ 4, valuePtr);
calloc.free(valuePtr);
checkError('uniform4iv');
}