gamnit: fix div by zero when there is no animation

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/lib/gamnit/flat/flat_core.nit b/lib/gamnit/flat/flat_core.nit
index 800b3de..932a584 100644 (file)
--- a/lib/gamnit/flat/flat_core.nit
+++ b/lib/gamnit/flat/flat_core.nit
@@ -687,7 +687,7 @@ private class Simple2dProgram
                        vec3 c; // coords
 
                        float end = a_start + a_loops/a_fps*a_n_frames;
-                       if (a_loops == -1.0 || time < end) {
+                       if (a_fps != 0.0 && (a_loops == -1.0 || time < end)) {
                                // in animation
                                float frame = mod(floor((time-a_start)*a_fps), a_n_frames);
                                v_coord = a_tex_coord + a_tex_diff*frame;