posix.cfg: Fixed wrong index. The memory is allocated at the 4'th parameter.

cfg/posix.cfg

@@ -3251,7 +3251,7 @@ The function 'mktemp' is considered to be dangerous due to race conditions and s
     <dealloc>mq_close</dealloc>
   </resource>
   <memory>
-    <alloc init="true" arg="3">getaddrinfo</alloc>
+    <alloc init="true" arg="4">getaddrinfo</alloc>
     <dealloc>freeaddrinfo</dealloc>
   </memory>
   <!-- This type definitions refer to http://pubs.opengroup.org/onlinepubs/009695399/basedefs/sys/types.h.html-->