Fix in example/collision.cpp: Use 0 instead of NULL for empty char

1 files changed, 1 insertions, 1 deletions

diff --git a/example/collision.cpp b/example/collision.cpp
index f08ae4e..4084809 100644
--- a/example/collision.cpp
+++ b/example/collision.cpp
@@ -20,7 +20,7 @@ public:
     cc = 0;
     kc = 0;
 
-    drawRectangle('#', NULL, {0,0}, {9,4}, _COL_GREEN, _COL_DEFAULT);
+    drawRectangle('#', 0, {0,0}, {9,4}, _COL_GREEN, _COL_DEFAULT);
   }
 
   ~testobject() { destruct(); }