Improve case consistency for structs

[jgcodes2020]

Here's a few structs from the current m64p_types.h.

mupen64plus-core/src/api/m64p_types.h

Lines 255 to 273 in 860fac3

	typedef struct
	{
	uint8_t init_PI_BSB_DOM1_LAT_REG; /* 0x00 */
	uint8_t init_PI_BSB_DOM1_PGS_REG; /* 0x01 */
	uint8_t init_PI_BSB_DOM1_PWD_REG; /* 0x02 */
	uint8_t init_PI_BSB_DOM1_PGS_REG2; /* 0x03 */
	uint32_t ClockRate; /* 0x04 */
	uint32_t PC; /* 0x08 */
	uint32_t Release; /* 0x0C */
	uint32_t CRC1; /* 0x10 */
	uint32_t CRC2; /* 0x14 */
	uint32_t Unknown[2]; /* 0x18 */
	uint8_t Name[20]; /* 0x20 */
	uint32_t unknown; /* 0x34 */
	uint32_t Manufacturer_ID; /* 0x38 */
	uint16_t Cartridge_ID; /* 0x3C - Game serial number */
	uint8_t Country_code; /* 0x3E */
	uint8_t Version; /* 0x3F */
	} m64p_rom_header;

mupen64plus-core/src/api/m64p_types.h

Lines 275 to 290 in 860fac3

	typedef struct
	{
	char goodname[256];
	char MD5[33];
	unsigned char savetype;
	unsigned char status; /* Rom status on a scale from 0-5. */
	unsigned char players; /* Local players 0-4, 2/3/4 way Netplay indicated by 5/6/7. */
	unsigned char rumble; /* 0 - No, 1 - Yes boolean for rumble support. */
	unsigned char transferpak; /* 0 - No, 1 - Yes boolean for transfer pak support. */
	unsigned char mempak; /* 0 - No, 1 - Yes boolean for memory pak support. */
	unsigned char biopak; /* 0 - No, 1 - Yes boolean for bio pak support. */
	unsigned char disableextramem; /* 0 - No, 1 - Yes boolean for disabling 4MB expansion RAM pack */
	unsigned int countperop; /* Number of CPU cycles per instruction. */
	unsigned int sidmaduration; /* Default SI DMA duration */
	unsigned int aidmamodifier; /* Percentage modifier for AI DMA duration */
	} m64p_rom_settings;

mupen64plus-core/src/api/m64p_types.h

Lines 182 to 221 in 860fac3

	typedef struct {
	/* Frontend-defined callback data. */
	void* cb_data;
	/* Allow the frontend to specify the GB cart ROM file to load
	* cb_data: points to frontend-defined callback data.
	* controller_num: (0-3) tell the frontend which controller is about to load a GB cart
	* Returns a NULL-terminated string owned by the core specifying the GB cart ROM filename to load.
	* Empty or NULL string results in no GB cart being loaded (eg. empty transferpak).
	*/
	char* (*get_gb_cart_rom)(void* cb_data, int controller_num);
	/* Allow the frontend to specify the GB cart RAM file to load
	* cb_data: points to frontend-defined callback data.
	* controller_num: (0-3) tell the frontend which controller is about to load a GB cart
	* Returns a NULL-terminated string owned by the core specifying the GB cart RAM filename to load
	* Empty or NULL string results in the core generating a default save file with empty content.
	*/
	char* (*get_gb_cart_ram)(void* cb_data, int controller_num);
	/* Allow the frontend to know what DD IPL ROM region file to load
	* cb_data: points to frontend-defined callback data.
	* region: a region from m64p_system_type
	*/
	void (*set_dd_rom_region)(void* cb_data, uint8_t region);
	/* Allow the frontend to specify the DD IPL ROM file to load
	* cb_data: points to frontend-defined callback data.
	* Returns a NULL-terminated string owned by the core specifying the DD IPL ROM filename to load
	* Empty or NULL string results in disabled 64DD.
	*/
	char* (*get_dd_rom)(void* cb_data);
	/* Allow the frontend to specify the DD disk file to load
	* cb_data: points to frontend-defined callback data.
	* Returns a NULL-terminated string owned by the core specifying the DD disk filename to load
	* Empty or NULL string results in no DD disk being loaded (eg. empty disk drive).
	*/
	char* (*get_dd_disk)(void* cb_data);
	} m64p_media_loader;

It would be a good code-formatting thing to stick with a common casing convention for these structs. Doing so will also make it easier to create bindings for other languages.