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net: Reduce scope of variables.

These are only needed inside the loop. Thanks @turol.

--- a/src/net_common.c

+++ b/src/net_common.c

@@ -537,9 +537,8 @@

 // no recognized protocols are read, NET_PROTOCOL_UNKNOWN is returned.

 net_protocol_t NET_ReadProtocolList(net_packet_t *packet)

 {

-    net_protocol_t result, p;

+    net_protocol_t result;

     unsigned int num_protocols;

-    char *name;

     int i;

     if (!NET_ReadInt8(packet, &num_protocols))

@@ -551,6 +550,9 @@

     for (i = 0; i < num_protocols; ++i)

     {

+        net_protocol_t p;

+        char *name;

+

         name = NET_ReadString(packet);

         if (name == NULL)

         {