Alpine/musl fix (#34)

* Add alpine dependencies to README

* Fix type error on non-glibc targets

README.md

@@ -32,6 +32,10 @@ Vanilla currently requires the following dependencies:
   ```
   # pacman -S qt6 ffmpeg libnl sdl2 dhclient
   ```
+- Alpine/postmarketOS
+  ```
+  # apk add qt6-qtbase-dev qt6-qtmultimedia-dev ffmpeg-dev libnl3-dev sdl2-dev dhclient
+  ```
 
 The build process is otherwise normal for a CMake program:
 

lib/wpa.h

@@ -2,6 +2,7 @@
 #define VANILLA_WPA_H
 
 #include <stdlib.h>
+#include <sys/types.h>
 
 struct wpa_ctrl;
 extern const char *wpa_ctrl_interface;