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Apply "103_fix-unequal-digit-h.diff" from the Debian package:
Unequal 18x18 or above was unplayable due to a clash with the undocumented
"H" (hint) key. Resolve the clash by making the hint function only fire
when no square is selected.

[originally from svn r8200]

--- a/unequal.c

+++ b/unequal.c

@@ -1296,8 +1296,6 @@

             return "";

         }

     }

-    if (button == 'H' || button == 'h')

-        return dupstr("H");

     if (ui->hx != -1 && ui->hy != -1) {

         debug(("button %d, cbutton %d", button, (int)((char)button)));

@@ -1323,6 +1321,10 @@

         return dupstr(buf);

     }

+

+    if (button == 'H' || button == 'h')

+        return dupstr("H");

+

     return NULL;

 }