fix test_sdl_alloctext

2 files changed, 4 insertions, 0 deletions

diff --git a/src/library_sdl.js b/src/library_sdl.js
index 7fad5941..75544765 100644
--- a/src/library_sdl.js
+++ b/src/library_sdl.js
@@ -549,6 +549,9 @@ var LibrarySDL = {
       var h = fontData.size;
       var fontString = h + 'px ' + fontData.name;
       var tempCtx = SDL.ttfContext;
+#if ASSERTIONS
+      assert(tempCtx, 'TTF_Init must have been called');
+#endif
       tempCtx.save();
       tempCtx.font = fontString;
       var ret = tempCtx.measureText(text).width | 0;
diff --git a/tests/sdl_alloctext.c b/tests/sdl_alloctext.c
index 3def2b28..173be348 100644
--- a/tests/sdl_alloctext.c
+++ b/tests/sdl_alloctext.c
@@ -9,6 +9,7 @@ int main()
     SDL_Init(SDL_INIT_VIDEO);
     SDL_Surface *screen = SDL_SetVideoMode(600, 450, 32, SDL_HWSURFACE);
 
+    TTF_Init();
     TTF_Font *font = TTF_OpenFont("myfont.ttf", 40);
 
     int i = 0;