Fix compiler warning for argument of getaddrinfo

Fix this clang warning:

    src/viewer/svutil.cpp:277:51:
      warning: missing field 'ai_protocol' initializer [-Wmissing-field-initializers]

Replace also PF_INET by AF_INET which is the recommended value.

Signed-off-by: Stefan Weil <[email protected]>

src/viewer/svutil.cpp

@@ -273,8 +273,6 @@ SVNetwork::SVNetwork(const char *hostname, int port) {
 
   buffer_ptr_ = nullptr;
 
-  struct addrinfo *addr_info = nullptr;
-  struct addrinfo hints = {0, PF_INET, SOCK_STREAM};
   auto port_string = std::to_string(port);
 #  ifdef _WIN32
   // Initialize Winsock
@@ -285,6 +283,10 @@ SVNetwork::SVNetwork(const char *hostname, int port) {
   }
 #  endif // _WIN32
 
+  struct addrinfo *addr_info = nullptr;
+  struct addrinfo hints = {};
+  hints.ai_family = AF_INET;
+  hints.ai_socktype = SOCK_STREAM;
   if (getaddrinfo(hostname, port_string.c_str(), &hints, &addr_info) != 0) {
     std::cerr << "Error resolving name for ScrollView host "
               << std::string(hostname) << ":" << port << std::endl;