[XMA] Swap input buffer on unresolvable split headers

src/xenia/apu/xma_context_new.cc

@@ -473,8 +473,13 @@ void XmaContextNew::Decode(XMA_CONTEXT_DATA* data) {
     const uint8_t* next_packet =
         GetNextPacket(data, next_packet_index, current_input_packet_count);
     if (!next_packet) {
-      // Matching split-body error handling below; correct error code unknown.
-      data->error_status = 4;
+      // Next buffer not available yet.  We can't resolve the split header
+      // without it, so consume (swap) the current buffer and move on.
+      XELOGAPU(
+          "XmaContext {}: Split frame header at packet {}, next buffer "
+          "unavailable — swapping input buffer",
+          id(), packet_index);
+      SwapInputBuffer(data);
       return;
     }
     std::memcpy(input_buffer_.data(), packet + kBytesPerPacketHeader,