/* TODO: Mesa returns a valid stub function, rather than NULL,
when we request a non-existent function */
#define CHECK(func, a) if ((a) == NULL) { fgWarning("fgInitGL2: " func " is NULL"); return; }
/* TODO: Mesa returns a valid stub function, rather than NULL,
when we request a non-existent function */
#define CHECK(func, a) if ((a) == NULL) { fgWarning("fgInitGL2: " func " is NULL"); return; }