vssh: remove the #ifdef for Curl_ssh_init, use empty macro

In the same style as other init calls

lib/easy.c

@@ -188,11 +188,10 @@ static CURLcode global_init(long flags, bool memoryfuncs)
     goto fail;
   }
 
-#if defined(USE_SSH)
   if(Curl_ssh_init()) {
+    DEBUGF(fprintf(stderr, "Error: Curl_ssh_init failed\n"));
     goto fail;
   }
-#endif
 
   easy_init_flags = flags;
 

lib/vssh/ssh.h

@@ -267,6 +267,7 @@ void Curl_ssh_attach(struct Curl_easy *data,
 /* for non-SSH builds */
 #define Curl_ssh_cleanup()
 #define Curl_ssh_attach(x,y)
+#define Curl_ssh_init() 0
 #endif
 
 #endif /* HEADER_CURL_SSH_H */