Initialize brightness on wayland too

src/detection/displayserver/linux/wayland.c

@@ -66,6 +66,7 @@ static void waylandOutputModeListener(void* data, struct wl_output* output, uint
     result->width = (uint32_t) width;
     result->height = (uint32_t) height;
     result->refreshRate = ffdsParseRefreshRate(refreshRate / 1000);
+    result->brightness = -1;
 }
 
 static void waylandGlobalAddListener(void* data, struct wl_registry* registry, uint32_t name, const char* interface, uint32_t version)

src/fastfetch.c

@@ -176,10 +176,11 @@ static inline void printCommandHelp(const char* command)
     }
     else if(strcasecmp(command, "resolution-format") == 0)
     {
-        constructAndPrintCommandHelpFormat("resolution", "{}x{} @ {}Hz", 3,
+        constructAndPrintCommandHelpFormat("resolution", "{}x{} @ {}Hz", 4,
             "Screen width",
             "Screen height",
-            "Screen refresh rate"
+            "Screen refresh rate",
+            "Screen brightness"
         );
     }
     else if(strcasecmp(command, "de-format") == 0)