Fix a few heigth/height typo.

doc/filters.texi

@@ -6786,11 +6786,11 @@ pixel format "yuv422p" @var{hsub} is 2 and @var{vsub} is 1.
 
 @item in_w, iw
 @item in_h, ih
-the input video width and heigth
+the input video width and height
 
 @item out_w, ow
 @item out_h, oh
-the output width and heigth, that is the size of the padded area as
+the output width and height, that is the size of the padded area as
 specified by the @var{width} and @var{height} expressions
 
 @item rotw(a)

libavfilter/vf_psnr.c

@@ -246,7 +246,7 @@ static int config_input_ref(AVFilterLink *inlink)
     s->nb_components = desc->nb_components;
     if (ctx->inputs[0]->w != ctx->inputs[1]->w ||
         ctx->inputs[0]->h != ctx->inputs[1]->h) {
-        av_log(ctx, AV_LOG_ERROR, "Width and heigth of input videos must be same.\n");
+        av_log(ctx, AV_LOG_ERROR, "Width and height of input videos must be same.\n");
         return AVERROR(EINVAL);
     }
     if (ctx->inputs[0]->format != ctx->inputs[1]->format) {