crashcatcher: show the message box before killing crashed process

This change fixes a random X server lock-up that I get about 1 in 10 times when a crash is caught. I'm presuming it's an X server bug since faulty applications shouldn't be able to crash or freeze the X server under any circumstances.

apps/openmw/crashcatcher.cpp

@@ -382,16 +382,17 @@ static void crash_handler(const char *logfile)
     fflush(stdout);
 
     if(crash_info.pid > 0)
-    {
         gdb_info(crash_info.pid);
-        kill(crash_info.pid, SIGKILL);
-    }
 
     if(logfile)
     {
         std::string message = "OpenMW has encountered a fatal error.\nCrash log saved to '" + std::string(logfile) + "'.\n Please report this to https://bugs.openmw.org !";
         SDL_ShowSimpleMessageBox(0, "Fatal Error", message.c_str(), NULL);
     }
+
+    if (crash_info.pid > 0)
+        kill(crash_info.pid, SIGKILL);
+
     exit(0);
 }