Fixes for functions that take string input paramters

Author: 9prady9

src/graphics.rs

@@ -67,7 +67,7 @@ impl Window {
             let mut temp: u64 = 0;
             let err_val = af_create_window(&mut temp as MutWndHandle,
                                            width as c_int, height as c_int,
-                                           title.as_bytes().as_ptr() as *const u8);
+                                           title.clone().as_bytes().as_ptr() as *const u8);
             match err_val {
                 0 => Ok(Window::from(temp)),
                 _ => Err(AfError::from(err_val)),
@@ -88,7 +88,7 @@ impl Window {
     pub fn set_title(&self, title: String) -> Result<(), AfError> {
         unsafe {
             let err_val = af_set_title(self.handle as WndHandle,
-                                       title.as_bytes().as_ptr() as *const u8);
+                                       title.clone().as_bytes().as_ptr() as *const u8);
             match err_val {
                 0 => Ok(()),
                 _ => Err(AfError::from(err_val)),

src/image/mod.rs

@@ -93,7 +93,7 @@ pub fn load_image(filename: String, is_color: bool) -> Result<Array, AfError> {
     unsafe {
         let mut temp: i64 = 0;
         let err_val = af_load_image(&mut temp as MutAfArray,
-                                    filename.as_bytes().as_ptr() as *const u8,
+                                    filename.clone().as_bytes().as_ptr() as *const u8,
                                     is_color as c_int);
         match err_val {
             0 => Ok(Array::from(temp)),
@@ -105,7 +105,7 @@ pub fn load_image(filename: String, is_color: bool) -> Result<Array, AfError> {
 #[allow(unused_mut)]
 pub fn save_image(filename: String, input: &Array) -> Result<(), AfError> {
     unsafe {
-        let err_val = af_save_image(filename.as_bytes().as_ptr() as *const u8,
+        let err_val = af_save_image(filename.clone().as_bytes().as_ptr() as *const u8,
                                     input.get() as AfArray);
         match err_val {
             0 => Ok(()),