message: Fix preprocessing empty filenames in #line statements
diff: @@ -1784,13 +1784,17 @@ DXBCContainer::DXBCContainer(bytebuf &ByteCode, const rdcstr &debugInfoPath, Gra
  {
  *c = 0;
  + rdcstr fname = filename;
  + if(fname.empty())
  + fname = "shader";
  +
  // find the new destination file
  bool found = false;
  size_t dstFileIdx = 0;
  for(size_t f = 0; f < splitFiles.size(); f++)
  {
  - if(splitFiles[f].filename == filename)
  + if(splitFiles[f].filename == fname)
  {
  found = true;
  dstFileIdx = f;
  @@ -1805,11 +1809,11 @@ DXBCContainer::DXBCContainer(bytebuf &ByteCode, const rdcstr &debugInfoPath, Gra
  }
  else
  {
  - RDCWARN("Couldn't find filename '%s' in #line directive in debug info", filename);
  + RDCWARN("Couldn't find filename '%s' in #line directive in debug info", fname.c_str());
  // make a dummy file to write into that won't be used.
  splitFiles.push_back(SplitFile());
  - splitFiles.back().filename = filename;
  + splitFiles.back().filename = fname;
  splitFiles.back().modified = true;
  changedFile = true;
  