Update ppc.rs

Author: CelestialAmber

objdiff-core/src/arch/ppc.rs

@@ -303,7 +303,7 @@ fn decode_exception_info(file: &File<'_>) -> Result<Option<BTreeMap<usize, Excep
             continue;
         };
         let data = match decode_extab(extab_data) {
-            Some(decoded_data) => decoded_data,
+            Ok(decoded_data) => decoded_data,
             Err(e) => {
                 log::warn!("Exception table decoding failed for function {}, reason: {}",
                 extab_func_name, e.to_string());