Add memory debugging.

Author: alistairjevans

ext/agoo/extconf.rb

@@ -11,7 +11,7 @@
   $CFLAGS += ' -std=c11'
 end
 
-$CFLAGS += ' -D_POSIX_SOURCE -D_GNU_SOURCE'
+$CFLAGS += ' -D_POSIX_SOURCE -D_GNU_SOURCE -DMEM_DEBUG'
 
 # Adding the __attribute__ flag only works with gcc compilers and even then it
 # does not work to check args with varargs so just remove the check.