fix: add guards for MagickImage.Lower

[Gounlaf]

👋

• https://github.com/ImageMagick/ImageMagick/blob/0deac72ed480ac2ec8e9d766c15ddb3bca055952/MagickCore/geometry.h#L129-L138 requires size_t for width, height ; struct used in https://github.com/ImageMagick/ImageMagick/blob/0deac72ed480ac2ec8e9d766c15ddb3bca055952/MagickCore/decorate.c#L628-L631
• https://github.com/dlemstra/Magick.Native/blob/4b111a550d57c4e7c95ba9bc486581c07981d9d4/src/Magick.Native/MagickImage.c#L1920-L1930 requires size_t for size
• no checks done on binding, except casting to UInt (so >= 0)

  Magick.NET/src/Magick.NET/Native/MagickImage.cs

  Lines 6829 to 6851 in f66b8aa

  	public void RaiseOrLower(int size, bool raise)
  	{
  	IntPtr exception = IntPtr.Zero;
  	#if PLATFORM_AnyCPU
  	if (Runtime.IsArm64)
  	#endif
  	#if PLATFORM_arm64 || PLATFORM_AnyCPU
  	NativeMethods.ARM64.MagickImage_RaiseOrLower(Instance, (UIntPtr)size, raise, out exception);
  	#endif
  	#if PLATFORM_AnyCPU
  	else if (Runtime.Is64Bit)
  	#endif
  	#if PLATFORM_x64 || PLATFORM_AnyCPU
  	NativeMethods.X64.MagickImage_RaiseOrLower(Instance, (UIntPtr)size, raise, out exception);
  	#endif
  	#if PLATFORM_AnyCPU
  	else
  	#endif
  	#if PLATFORM_x86 || PLATFORM_AnyCPU
  	NativeMethods.X86.MagickImage_RaiseOrLower(Instance, (UIntPtr)size, raise, out exception);
  	#endif
  	CheckException(exception);
  	}

Regards 🙂

[Gounlaf]

Will fix tests tomorrow