Added missing return statement.

src/core/android/SDL_android.c

@@ -369,6 +369,7 @@ SDL_bool Android_JNI_DeleteContext(SDL_GLContext context)
     /* There's only one context, so the parameter is ignored for now */
     JNIEnv *env = Android_JNI_GetEnv();
     (*env)->CallStaticVoidMethod(env, mActivityClass, midDeleteGLContext);
+    return SDL_TRUE;
 }
 
 void Android_JNI_SwapWindow()