lib: add bounds to prevent out of bounds read panic

src/lib.rs

@@ -73,7 +73,8 @@ impl KbinXml {
 
     // Remove trailing null bytes
     let mut index = data.len() - 1;
-    while index > 0 && data[index] == 0x00 {
+    let len = data.len();
+    while index < len && data[index] == 0x00 {
       index -= 1;
     }
     data.truncate(index + 1);