Added PFN_BGFX_GET_INTERFACE.

include/bgfx/c99/bgfx.h

@@ -674,6 +674,9 @@ typedef struct bgfx_encoder_s bgfx_encoder_t;
 
 #include "bgfx.idl.h"
 
+/**/
+typedef bgfx_interface_vtbl_t* (*PFN_BGFX_GET_INTERFACE)(uint32_t _version);
+
 /**/
 BGFX_C_API bgfx_interface_vtbl_t* bgfx_get_interface(uint32_t _version);