is_ratio_l/r in Stereo_Process_Intensity_Short are not used

[hajimehoshi]

It looks like variables is_ratio_l and is_ratio_r are just assigned but not used anywhere.

[hajimehoshi]

https://github.com/technosaurus/PDMP3/blob/master/pdmp3.c#L2212

left = is_ratio_l = id->g_main_data.is[gr][0][i];
right = is_ratio_r = id->g_main_data.is[gr][0][i];

should be

left = is_ratio_l * id->g_main_data.is[gr][0][i];
right = is_ratio_r * id->g_main_data.is[gr][0][i];

?