message: Fixed typo in CV_Error message
  Error was "Input parameters must be a matrices!", but "matrices" is plural and doesn't allow the unspecific article "a".
diff: @@ -1737,7 +1737,7 @@ void cvCalibrationMatrixValues( const CvMat *calibMatr, CvSize imgSize,
  CV_Error(CV_StsNullPtr, "Some of parameters is a NULL pointer!");
  if(!CV_IS_MAT(calibMatr))
  - CV_Error(CV_StsUnsupportedFormat, "Input parameters must be a matrices!");
  + CV_Error(CV_StsUnsupportedFormat, "Input parameters must be matrices!");
  double dummy = .0;
  Point2d pp;
  @@ -3078,7 +3078,7 @@ cvDecomposeProjectionMatrix( const CvMat *projMatr, CvMat *calibMatr,
  CV_Error(CV_StsNullPtr, "Some of parameters is a NULL pointer!");
  if(!CV_IS_MAT(projMatr) || !CV_IS_MAT(calibMatr) || !CV_IS_MAT(rotMatr) || !CV_IS_MAT(posVect))
  - CV_Error(CV_StsUnsupportedFormat, "Input parameters must be a matrices!");
  + CV_Error(CV_StsUnsupportedFormat, "Input parameters must be matrices!");
  if(projMatr->cols != 4 || projMatr->rows != 3)
  CV_Error(CV_StsUnmatchedSizes, "Size of projection matrix must be 3x4!");
  