RPi Compilation Fixed (#298)

Fix compilation errors on the Raspberry PI

src/native/linux_wayland.rs

@@ -143,15 +143,15 @@ unsafe extern "C" fn seat_handle_capabilities(
 extern "C" fn seat_handle_name(
     _data: *mut std::ffi::c_void,
     _seat: *mut wl_seat,
-    _name: *const i8,
+    _name: *const ::std::os::raw::c_char,
 ) {
 }
 
 unsafe extern "C" fn registry_add_object(
     data: *mut std::ffi::c_void,
     registry: *mut wl_registry,
     name: u32,
-    interface: *const i8,
+    interface: *const ::std::os::raw::c_char,
     version: u32,
 ) {
     let payload: &mut WaylandPayload = &mut *(data as *mut _);

src/native/linux_wayland/extensions.rs

@@ -58,7 +58,7 @@ macro_rules! wayland_interface {
             }),*];
 
             pub static mut $name: wl_interface = wl_interface {
-                name: concat!(stringify!($struct_name), '\0').as_ptr() as *const i8,
+                name: concat!(stringify!($struct_name), '\0').as_ptr() as *const _,
                 version: $version,
                 method_count: crate::count!($($method_name)*) as i32,
                 methods: unsafe { requests.as_ptr() },