Parameter value from a program object

Property definitions

glesv2 :: glesv2 $ Sys :: glGetProgramiv
# Parameter value from a `program` object
fun glGetProgramiv(program: GLProgram, pname: GLGetParameterName): Int `{
	int value;
	glGetProgramiv(program, pname, &value);
	return value;
`}
lib/glesv2/glesv2.nit:204,1--209,2