[APU] Removed old hack that invalidates input on decoder error

Added returning parsing error while decoder fails

src/xenia/apu/xma_context.cc

@@ -633,9 +633,8 @@ void XmaContext::Decode(XMA_CONTEXT_DATA* data) {
     */
     if (ret < 0) {
       XELOGE("XmaContext {}: Error during decoding", id());
-      data->input_buffer_0_valid = 0;
-      data->input_buffer_1_valid = 0;
-
+      data->parser_error_status = 4;  // TODO(Gliniak): Find all parsing errors
+                                      // and create enumerator from them
       assert_always();
       return;  // TODO bail out
     }

src/xenia/apu/xma_context.h

@@ -81,7 +81,7 @@ struct XMA_CONTEXT_DATA {
   // DWORD 3
   uint32_t loop_start : 26;  // XMASetLoopData LoopStartOffset
                              // frame offset in bits
-  uint32_t unk_dword_3 : 6;  // ? ParserErrorStatus/ParserErrorSet(?)
+  uint32_t parser_error_status : 6;  // ? ParserErrorStatus/ParserErrorSet(?)
 
   // DWORD 4
   uint32_t loop_end : 26;        // XMASetLoopData LoopEndOffset