udptunnel: fix compilation with GCC14

Missing int in main.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

net/udptunnel/Makefile

@@ -2,7 +2,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=udptunnel
 PKG_VERSION:=1.1
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://www.cs.columbia.edu/~lennox/udptunnel

net/udptunnel/patches/010-gcc14.patch

@@ -0,0 +1,11 @@
+--- a/configure
++++ b/configure
+@@ -905,7 +905,7 @@ cat > conftest.$ac_ext << EOF
+ #line 906 "configure"
+ #include "confdefs.h"
+ 
+-main(){return(0);}
++int main(){return(0);}
+ EOF
+ if { (eval echo configure:911: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+   ac_cv_prog_cc_works=yes