fixed bug causing access to negative array index

diff --git a/src/editor.c b/src/editor.c
index 3fa42f10eab74c5accddb47ecc8d90872e340f06..093b229083d6f4e3539ebfd28ccd0559718e21c2 100644 (file)
--- a/src/editor.c
+++ b/src/editor.c
@@ -10876,7 +10876,6 @@ static void SetElementIntelliDraw(int x, int y, int new_element,
   };
   static int last_x = -1;
   static int last_y = -1;
-  int old_element = IntelliDrawBuffer[x][y];
 
   if (new_element == EL_UNDEFINED)
   {
@@ -10886,6 +10885,8 @@ static void SetElementIntelliDraw(int x, int y, int new_element,
     return;
   }
 
+  int old_element = IntelliDrawBuffer[x][y];
+
   if (IS_TUBE(new_element))
   {
     int last_element_new = EL_UNDEFINED;