Use correct integer types in touch

Author: eagleflo

src/sdl2/touch.rs

@@ -5,20 +5,20 @@ pub use sys::touch as ll;
 pub type Finger = ll::Finger;
 pub type TouchDevice = ll::TouchDevice;
 
-pub fn get_num_touch_devices() -> isize {
-    unsafe { ll::SDL_GetNumTouchDevices() as isize }
+pub fn get_num_touch_devices() -> i32 {
+    unsafe { ll::SDL_GetNumTouchDevices() }
 }
 
-pub fn get_touch_device(index: isize) -> TouchDevice {
-    unsafe { ll::SDL_GetTouchDevice(index as i32) }
+pub fn get_touch_device(index: i32) -> TouchDevice {
+    unsafe { ll::SDL_GetTouchDevice(index) }
 }
 
-pub fn get_num_touch_fingers(touch: TouchDevice) -> isize {
-    unsafe { ll::SDL_GetNumTouchFingers(touch) as isize }
+pub fn get_num_touch_fingers(touch: TouchDevice) -> i32 {
+    unsafe { ll::SDL_GetNumTouchFingers(touch) }
 }
 
-pub fn get_touch_finger(touch: TouchDevice, index: isize) -> Option<Finger> {
-    let raw = unsafe { ll::SDL_GetTouchFinger(touch, index as i32) };
+pub fn get_touch_finger(touch: TouchDevice, index: i32) -> Option<Finger> {
+    let raw = unsafe { ll::SDL_GetTouchFinger(touch, index) };
 
     if raw == ptr::null() {
         None