Merge pull request #456 from hjiayz/patch-1

fix bug

Author: MarcusDunn

llama-cpp-2/src/model.rs

@@ -1,5 +1,6 @@
 //! A safe wrapper around `llama_model`.
 use std::ffi::CString;
+use std::ffi::CStr;
 use std::num::NonZeroU16;
 use std::os::raw::c_int;
 use std::path::Path;
@@ -549,7 +550,7 @@ impl LlamaModel {
             if res > buff.len() as i32 {
                 return Err(ApplyChatTemplateError::BuffSizeError);
             }
-            String::from_utf8(buff.iter().filter(|c| **c > 0).map(|&c| c as u8).collect())
+            Ok::<String, ApplyChatTemplateError>(CStr::from_ptr(buff.as_mut_ptr()).to_string_lossy().to_string())
         }?;
         Ok(formatted_chat)
     }