fix: handle a textools bug explicitly

src/error.rs

@@ -16,4 +16,6 @@ pub enum Error {
     SqPackError(#[from] sqpack::binrw::Error),
     #[error("error writing to output")]
     BinRwWrite(sqpack::binrw::Error),
+    #[error("a bug in textools corrupted this mod pack")]
+    TexToolsBug,
 }

src/ttmp_extractor.rs

@@ -347,6 +347,9 @@ impl<R: Read> TtmpExtractor<R> {
             let mut reader = (&mut reader).take(header.uncompressed_size as u64);
             let read = std::io::copy(&mut reader, &mut writer).map_err(Error::Io)?;
             (read, read)
+        } else if header.compressed_size == 0 {
+            // https://github.com/TexTools/xivModdingFramework/issues/51
+            return Err(Error::TexToolsBug);
         } else {
             // compressed
             let reader = (&mut reader).take(header.compressed_size as u64);