(trunk libT) fix small dead code. found by clang static analyzer and reported by d0k

libtransmission/ConvertUTF.c

@@ -353,7 +353,7 @@ Boolean
 tr_utf8_validate( const char * str, int max_len, const char ** end )
 {
     const UTF8* source = (const UTF8*) str;
-    const UTF8* sourceEnd = source;
+    const UTF8* sourceEnd;
 
     if( max_len == 0 )
         return true;

libtransmission/net.c

@@ -530,7 +530,6 @@ tr_netBindTCP( const tr_address * addr, tr_port port, tr_bool suppressMsgs )
     struct sockaddr_storage sock;
     const int               type = SOCK_STREAM;
     int                     addrlen;
-    int                     retval;
 
 #if defined( SO_REUSEADDR ) || defined( SO_REUSEPORT ) || defined( IPV6_V6ONLY )
     int                optval = 1;
@@ -548,8 +547,8 @@ tr_netBindTCP( const tr_address * addr, tr_port port, tr_bool suppressMsgs )
 
 #ifdef IPV6_V6ONLY
     if( addr->type == TR_AF_INET6 && 
-        ( retval = setsockopt( s, IPPROTO_IPV6, IPV6_V6ONLY, &optval,
-                             sizeof( optval ) ) ) == -1 ) {
+        setsockopt( s, IPPROTO_IPV6, IPV6_V6ONLY, &optval,
+                             sizeof( optval ) ) == -1 ) {
         /* the kernel may not support this. if not, ignore it */
         if( errno != ENOPROTOOPT )
             return -errno;

libtransmission/web.c

@@ -84,7 +84,7 @@ struct tr_web
 static struct tr_web_sockinfo *
 getSockinfo( tr_web * web, int fd, tr_bool createIfMissing )
 {
-    tr_list * l = web->fds;
+    tr_list * l;
 
     for( l=web->fds; l!=NULL; l=l->next ) {
         struct tr_web_sockinfo * s =  l->data;