Fixed: build error with ImageMagick 6.8.9 (when deprecated functions are excluded)

Replaced deprecated functions

- RadialBlurImage -> RotationalBlurImage
- RadialBlurImageChannel -> RotationalBlurImageChannel
- ConstituteComponentTerminus(DestroyConstitute) -> (removed)
- GetExceptionInfo -> AcquireExceptionInfo

<cite>[deprecate.c in ImageMagick/branches/ImageMagick-6/magick – ImageMagick](http://trac.imagemagick.org/browser/ImageMagick/branches/ImageMagick-6/magick/deprecate.c)</cite>

```
MagickExport void DestroyConstitute(void)
{
}
```
```
MagickExport void ConstituteComponentTerminus(void)
{
}
``` 
```
MagickExport Image *RadialBlurImage(const Image *image,const double angle,
  ExceptionInfo *exception)
{
  return(RotationalBlurImage(image,angle,exception));
}
```  
```
MagickExport Image *RadialBlurImageChannel(const Image *image,
  const ChannelType channel,const double angle,ExceptionInfo *exception)
{
  return(RotationalBlurImageChannel(image,channel,angle,exception));
}
```
```
MagickExport void GetExceptionInfo(ExceptionInfo *exception)
{
  assert(exception != (ExceptionInfo *) NULL);
  (void) ResetMagickMemory(exception,0,sizeof(*exception));
  exception->severity=UndefinedException;
  exception->exceptions=(void *) NewLinkedList(0);
  exception->semaphore=AllocateSemaphoreInfo();
  exception->signature=MagickSignature;
}
```  

<cite>[exception.c in ImageMagick/branches/ImageMagick-6/magick – ImageMagick](http://trac.imagemagick.org/browser/ImageMagick/branches/ImageMagick-6/magick/exception.c)</cite>

```
MagickExport ExceptionInfo *AcquireExceptionInfo(void)
{
  ExceptionInfo
    *exception;
 
  exception=(ExceptionInfo *) AcquireMagickMemory(sizeof(*exception));
  if (exception == (ExceptionInfo *) NULL)
    ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
  InitializeExceptionInfo(exception);
  exception->relinquish=MagickTrue;
  return(exception);
}
```  
```
MagickPrivate void InitializeExceptionInfo(ExceptionInfo *exception)
{
  assert(exception != (ExceptionInfo *) NULL);
  (void) ResetMagickMemory(exception,0,sizeof(*exception));
  exception->severity=UndefinedException;
  exception->exceptions=(void *) NewLinkedList(0);
  exception->semaphore=AllocateSemaphoreInfo();
  exception->signature=MagickSignature;
}
```