Update video.go error handling, add SetError() and INIT_EVENTS

Author: malashin

BREAKING.md

@@ -61,6 +61,10 @@
 + `GetCurrentVideoDriver()` returns (string, error) instead of string
 + `Window.Destroy()` returns error
 + `Window.GetID()` returns (uint32, error) instead of uint32
++ `GetNumRenderDrivers()` returns (int, error) instead of int
++ `GetRenderDriverInfo()` returns (int, error) instead of int
++ `Texture.Destroy()` returns error
++ `Renderer.Destroy()` returns error
 
 - Unexported `Padding` in `AudioSpec` struct
 - Unexported `goHintCallback`

sdl/error.go

@@ -1,5 +1,12 @@
 package sdl
 
+/*
+#include "sdl_wrapper.h"
+
+void GoSetError(const char *fmt) {
+  SDL_SetError("%s", fmt);
+}
+*/
 // #include "sdl_wrapper.h"
 import "C"
 import "errors"
@@ -35,6 +42,16 @@ func GetError() error {
 	return nil
 }
 
+// SetError set the SDL error message.
+// (https://wiki.libsdl.org/SDL_SetError)
+func SetError(err error) {
+	if err != nil {
+		C.GoSetError(C.CString(err.Error()))
+		return
+	}
+	C.GoSetError(nil)
+}
+
 // ClearError clears any previous error message.
 // (https://wiki.libsdl.org/SDL_ClearError)
 func ClearError() {