File gltools-2.4-no-return-in-non-void-fix.patch of Package gltools

diff -urN gltools-2-4-orig/glwexample-evctrl.c gltools-2-4/glwexample-evctrl.c
--- gltools-2-4-orig/glwexample-evctrl.c	1998-01-27 19:54:34.000000000 +0100
+++ gltools-2-4/glwexample-evctrl.c	2012-08-06 12:31:39.301602926 +0200
@@ -80,7 +80,7 @@
 
 
 
-int main(int argc, char *argv[])
+void main(int argc, char *argv[])
 {
   struct mydatastruct mydata;
   glWindow w;