Fix compiler warning if user code is compiled with '-Wextra' (2)

Replace '(void*)' cast with '(fl_intptr_t)' because older gcc (4.8.2)
issues a warning with '(void*)'.

1 files changed, 4 insertions, 2 deletions

diff --git a/FL/Fl_Widget.H b/FL/Fl_Widget.H
index 8e3637727..cf3a16b4f 100644
--- a/FL/Fl_Widget.H
+++ b/FL/Fl_Widget.H
@@ -684,7 +684,9 @@ public:
       Each widget has a single callback.
       \param[in] cb new callback
    */
-  void callback(Fl_Callback0* cb) {callback_ = (Fl_Callback*)(void*)cb;}
+  void callback(Fl_Callback0* cb) {
+    callback_ = (Fl_Callback*)(fl_intptr_t)(cb);
+  }
 
   /** Sets the current callback function for the widget.
       Each widget has a single callback.
@@ -692,7 +694,7 @@ public:
       \param[in] p user data
    */
   void callback(Fl_Callback1* cb, long p = 0) {
-    callback_ = (Fl_Callback*)(void *)cb;
+    callback_ = (Fl_Callback*)(fl_intptr_t)(cb);
     user_data_ = (void*)(fl_intptr_t)p;
   }