Fixed typo in test header file comment.
diff --git a/include/SDL_test.h b/include/SDL_test.h
index 5eed41a..77b350b 100644
--- a/include/SDL_test.h
+++ b/include/SDL_test.h
@@ -52,7 +52,7 @@ extern "C" {
/* Global definitions */
/*
- * Note: Maximum size of SDLTest log message is less than SDLs limit
+ * Note: Maximum size of SDLTest log message is less than SDL's limit
* to ensure we can fit additional information such as the timestamp.
*/
#define SDLTEST_MAX_LOGMESSAGE_LENGTH 3584