Mouse: Fix the if blocks in mouse_subtract_z().

src/device/mouse.c

@@ -482,10 +482,10 @@ mouse_subtract_z(int *delta_z, int min, int max, int invert)
     int z = atomic_load(&mouse_z);
     int real_z = invert ? -z : z;
 
-    if (mouse_z > max) {
+    if (real_z > max) {
         *delta_z = max;
         real_z -= max;
-    } else if (mouse_z < min) {
+    } else if (real_z < min) {
         *delta_z = min;
         real_z += ABS(min);
     } else {