diff --git a/LEGO1/mxregion.cpp b/LEGO1/mxregion.cpp
index c9949091..d6693e0a 100644
--- a/LEGO1/mxregion.cpp
+++ b/LEGO1/mxregion.cpp
@@ -42,40 +42,41 @@ void MxRegion::vtable18(MxRect32 &p_rect)
   MxRegionListCursor cursor(m_list);
 
   if (rectCopy.m_left < rectCopy.m_right) {
-    MxRegionTopBottom *topBottom;
-    while (rectCopy.m_top < rectCopy.m_bottom && cursor.Next(topBottom)) {
+    while (rectCopy.m_top < rectCopy.m_bottom) {
+      MxRegionTopBottom *topBottom;
+      if (!cursor.Next(topBottom))
+        break;
+
       if (topBottom->m_top >= rectCopy.m_bottom) {
         MxRegionTopBottom *newTopBottom = new MxRegionTopBottom(rectCopy);
         cursor.Prepend(newTopBottom);
         rectCopy.m_top = rectCopy.m_bottom;
       }
-      else {
-        if (rectCopy.m_top < topBottom->m_bottom) {
-          if (rectCopy.m_top < topBottom->m_top) {
-            MxRect32 topBottomRect(rectCopy.m_left, rectCopy.m_top, rectCopy.m_right, topBottom->m_top);
-            MxRegionTopBottom *newTopBottom = new MxRegionTopBottom(topBottomRect);
-            cursor.Prepend(newTopBottom);
-            rectCopy.m_top = topBottom->m_top;
-          }
-          else if (topBottom->m_top < rectCopy.m_top) {
-            MxRegionTopBottom *newTopBottom = topBottom->Clone();
-            newTopBottom->m_bottom = rectCopy.m_top;
-            topBottom->m_top = rectCopy.m_top;
-            cursor.Prepend(newTopBottom);
-          }
+      else if (rectCopy.m_top < topBottom->m_bottom) {
+        if (rectCopy.m_top < topBottom->m_top) {
+          MxRect32 topBottomRect(rectCopy.m_left, rectCopy.m_top, rectCopy.m_right, topBottom->m_top);
+          MxRegionTopBottom *newTopBottom = new MxRegionTopBottom(topBottomRect);
+          cursor.Prepend(newTopBottom);
+          rectCopy.m_top = topBottom->m_top;
+        }
+        else if (topBottom->m_top < rectCopy.m_top) {
+          MxRegionTopBottom *newTopBottom = topBottom->Clone();
+          newTopBottom->m_bottom = rectCopy.m_top;
+          topBottom->m_top = rectCopy.m_top;
+          cursor.Prepend(newTopBottom);
+        }
 
-          if (rectCopy.m_bottom < topBottom->m_top) {
-            MxRegionTopBottom *newTopBottom = topBottom->Clone();
-            newTopBottom->m_bottom = rectCopy.m_bottom;
-            topBottom->m_top = rectCopy.m_bottom;
-            newTopBottom->FUN_100c5280(rectCopy.m_left, rectCopy.m_right);
-            cursor.Prepend(newTopBottom);
-            rectCopy.m_top = rectCopy.m_bottom; 
-          }
-          else {
-            topBottom->FUN_100c5280(rectCopy.m_left, rectCopy.m_right);
-            rectCopy.m_top = topBottom->m_top;
-          }
+        if (rectCopy.m_bottom < topBottom->m_top) {
+          MxRegionTopBottom *newTopBottom = topBottom->Clone();
+          newTopBottom->m_bottom = rectCopy.m_bottom;
+          topBottom->m_top = rectCopy.m_bottom;
+          newTopBottom->FUN_100c5280(rectCopy.m_left, rectCopy.m_right);
+          cursor.Prepend(newTopBottom);
+          rectCopy.m_top = rectCopy.m_bottom; 
+        }
+        else {
+          topBottom->FUN_100c5280(rectCopy.m_left, rectCopy.m_right);
+          rectCopy.m_top = topBottom->m_top;
         }
       }