diff -upr xshisen-1.51.org/body.C xshisen-1.51/body.C
--- xshisen-1.51.org/body.C	2002-07-07 16:22:35.000000000 +0900
+++ xshisen-1.51/body.C	2009-12-02 00:00:00.000000000 +0900
@@ -54,6 +54,7 @@ Body::Body(int g, int x, int y, Widget p
     }
     clearqueue = 0;
     hintNum    = 0;
+    hintArray  = NULL;
     pause      = 0;
     if (game >= NUM_GAME*2)
         gravity = 1;
@@ -227,8 +228,12 @@ Body::refreshhint(void)
     p = new Point[max_c][2];
     t = new Point[xsize*ysize/PKIND];
 
-    if (hintNum == 0)
-        delete[] hintArray;
+    if (hintNum == 0) {
+        if (hintArray) {
+            delete[] hintArray;
+            hintArray = NULL;
+        }
+    }
     for(int i=0; i<PKIND; i++) {
         piepos[i]->GetPosArray(t, num);
         for(int j=0; j<num; j++)