Merge pull request #530 from EXetoC/master

Missing SDL_image symbols

lib/wrappers/sdl/sdl_image.nim

@@ -163,6 +163,17 @@ proc IMG_Linked_Version*(): Pversion{.importc: "IMG_Linked_Version",
   #   surface afterwards by calling:
   #        SDL_SetColorKey(image, SDL_RLEACCEL, image.format.colorkey);
   #
+
+const
+  IMG_INIT_JPG* = 0x00000001
+  IMG_INIT_PNG* = 0x00000002
+  IMG_INIT_TIF* = 0x00000004
+  IMG_INIT_WEBP* = 0x00000008
+
+proc IMG_Init*(flags: cint): int {.cdecl, importc: "IMG_Init",
+                                  dynlib: ImageLibName.}
+proc IMG_Quit*() {.cdecl, importc: "IMG_Quit",
+                                  dynlib: ImageLibName.}
 proc IMG_LoadTyped_RW*(src: PRWops, freesrc: cint, theType: cstring): PSurface{.
     cdecl, importc: "IMG_LoadTyped_RW", dynlib: ImageLibName.}
   # Convenience functions