log to stderr, not stdout

stdout is the wrong stream for this; human-readable logs should go to
stderr.

Author: mlugg

GhostServer/main_cli.cpp

@@ -22,15 +22,15 @@ int main(int argc, char **argv) {
     });
 
     if (argc > 3 || (argc == 2 && (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")))) {
-        printf("Usage: %s [port] [logfile]\n", argv[0]);
+        fprintf(stderr, "Usage: %s [port] [logfile]\n", argv[0]);
         return 1;
     }
 
     int port = 53000;
     if (argc >= 2) {
         port = atoi(argv[1]);
         if (port < 1 || port > 65535) {
-            printf("Invalid port %d\n", port);
+            fprintf(stderr, "Invalid port %d\n", port);
             return 1;
         }
     }
@@ -45,7 +45,7 @@ int main(int argc, char **argv) {
 
     puts("Server starting up");
     if (!network.StartServer(port)) {
-        printf("Failed to start server on port %d\n", port);
+        fprintf(stderr, "Failed to start server on port %d\n", port);
         return 1;
     }
     while (!g_should_stop) {

GhostServer/networkmanager.cpp

@@ -25,7 +25,7 @@ static void file_log(std::string str) {
 # define GHOST_LOG(x) (file_log(x), emit this->OnNewEvent(QString::fromStdString(x)))
 #else
 # include <stdio.h>
-# define GHOST_LOG(x) (file_log(x), printf("[LOG] %s\n", std::string(x).c_str()))
+# define GHOST_LOG(x) (file_log(x), fprintf(stderr, "[LOG] %s\n", std::string(x).c_str()))
 #endif
 
 #define HEARTBEAT_RATE 5000