Fix float casting when autoscaling int values to byte

Fixes ome#4210.

components/formats-bsd/src/loci/formats/gui/AWTImageTools.java

@@ -1655,7 +1655,7 @@ else if (pixels instanceof int[][]) {
           else if (ints[i][j] <= min) out[i][j] = 0;
           else {
             int diff = max - min;
-            float dist = (ints[i][j] - min) / diff;
+            float dist = (float) (ints[i][j] - min) / diff;
             out[i][j] = (byte) (dist * 256);
           }
         }