Fix gr-osmosdr build issue with clang

gr-osmosdr-clang.patch

diff --git a/lib/rtl_tcp/rtl_tcp_source_c.cc b/lib/rtl_tcp/rtl_tcp_source_c.cc
index ecdeee0..71f28ac 100644
--- a/lib/rtl_tcp/rtl_tcp_source_c.cc
+++ b/lib/rtl_tcp/rtl_tcp_source_c.cc
@@ -296,20 +296,18 @@ rtl_tcp_source_c::rtl_tcp_source_c(const std::string &args) :
   set_gain_mode(false); /* enable manual gain mode by default */
 
   // set direct sampling
-  struct command cmd;
-
-  cmd = { 0x09, htonl(direct_samp) };
-  send(d_socket, (const char*)&cmd, sizeof(cmd), 0);
+  struct command cmd1 = { 0x09, htonl(direct_samp) };
+  send(d_socket, (const char*)&cmd1, sizeof(cmd1), 0);
   if (direct_samp)
     _no_tuner = true;
 
   // set offset tuning
-  cmd = { 0x0a, htonl(offset_tune) };
-  send(d_socket, (const char*)&cmd, sizeof(cmd), 0);
+  struct command cmd2 = { 0x0a, htonl(offset_tune) };
+  send(d_socket, (const char*)&cmd2, sizeof(cmd2), 0);
 
   // set bias tee
-  cmd = { 0x0e, htonl(bias_tee) };
-  send(d_socket, (const char*)&cmd, sizeof(cmd), 0);
+  struct command cmd3 = { 0x0e, htonl(bias_tee) };
+  send(d_socket, (const char*)&cmd3, sizeof(cmd3), 0);
 }
 
 rtl_tcp_source_c::~rtl_tcp_source_c()
@@ -563,12 +561,12 @@ osmosdr::gain_range_t rtl_tcp_source_c::get_gain_range( const std::string & name
 bool rtl_tcp_source_c::set_gain_mode( bool automatic, size_t chan )
 {
   // gain mode
-  struct command cmd = { 0x03, htonl(!automatic) };
-  send(d_socket, (const char*)&cmd, sizeof(cmd), 0);
+  struct command cmd1 = { 0x03, htonl(!automatic) };
+  send(d_socket, (const char*)&cmd1, sizeof(cmd1), 0);
 
   // AGC mode
-  cmd = { 0x08, htonl(automatic) };
-  send(d_socket, (const char*)&cmd, sizeof(cmd), 0);
+  struct command cmd2 = { 0x08, htonl(automatic) };
+  send(d_socket, (const char*)&cmd2, sizeof(cmd2), 0);
 
   _auto_gain = automatic;