Fix for an underflow on some type conversions (#1715)

1 files changed, 2 insertions, 2 deletions

diff --git a/winpty/src/windows.rs b/winpty/src/windows.rs
index 67370709..84762585 100644
--- a/winpty/src/windows.rs
+++ b/winpty/src/windows.rs
@@ -201,12 +201,12 @@ impl<'a, 'b> Winpty<'a> {
     /// Change the size of the Windows console window.
     /// 
     /// cols & rows MUST be greater than 0
-    pub fn set_size(&mut self, cols: usize, rows: usize) -> Result<(), Err> {
+    pub fn set_size(&mut self, cols: u16, rows: u16) -> Result<(), Err> {
         assert!(cols > 0 && rows > 0);
         let mut err = null_mut() as *mut winpty_error_t;
 
         unsafe {
-            winpty_set_size(self.0, cols as i32, rows as i32, &mut err);
+            winpty_set_size(self.0, i32::from(cols), i32::from(rows), &mut err);
         }
 
         if let Some(err) = check_err(err) {