message: Fix use of wrong instruction counter when instruction info is sparse
diff: @@ -670,7 +670,7 @@ void ShaderViewer::debugShader(const ShaderBindpointMapping *bind, const ShaderR
  }
  if(disasmLine > 0)
  - m_AsmLine2Inst[disasmLine] = (int)inst;
  + m_AsmLine2Inst[disasmLine] = (int)instInfo.instruction;
  if(line.fileIndex < 0)
  continue;
  @@ -686,7 +686,7 @@ void ShaderViewer::debugShader(const ShaderBindpointMapping *bind, const ShaderR
  prevLine = line;
  - m_Location2Inst[line].push_back(inst);
  + m_Location2Inst[line].push_back(instInfo.instruction);
  }
  // if we don't have line mapping info, assume we also don't have useful high-level variable
  