Fixed bug 3517 - Compiler warnings with gcc -Wstrict-prototypes

felix

Compiling even a simple SDL2 'hello world' program with gcc -Wstrict-prototypes (GCC 6.2.1) results in warnings like:

/usr/include/SDL2/SDL_gamecontroller.h:143:1: attention : function declaration isn't a prototype [-Wstrict-prototypes]
 extern DECLSPEC int SDLCALL SDL_GameControllerNumMappings();
 ^~~~~~

It seems there is a missing 'void' between the parentheses.

src/video/haiku/SDL_bkeyboard.cc

@@ -41,7 +41,7 @@ extern "C" {
 static SDL_Scancode keymap[KEYMAP_SIZE];
 static int8 keystate[KEYMAP_SIZE];
 
-void BE_InitOSKeymap() {
+void BE_InitOSKeymap(void) {
 		for( uint i = 0; i < SDL_TABLESIZE(keymap); ++i ) {
 			keymap[i] = SDL_SCANCODE_UNKNOWN;
 		}

src/video/haiku/SDL_bkeyboard.h

@@ -30,7 +30,7 @@ extern "C" {
 
 #include "../../../include/SDL_keyboard.h"
 
-extern void BE_InitOSKeymap();
+extern void BE_InitOSKeymap(void);
 extern SDL_Scancode BE_GetScancodeFromBeKey(int32 bkey);
 extern int8 BE_GetKeyState(int32 bkey);
 extern void BE_SetKeyState(int32 bkey, int8 state);