Added support for GROUP4 compression to the FAX coder.
diff --git a/MagickCore/coder.c b/MagickCore/coder.c
index ccfbf48..d8907f0 100644
--- a/MagickCore/coder.c
+++ b/MagickCore/coder.c
@@ -130,6 +130,7 @@
     { "FTP", "URL" },
     { "FTS", "FITS" },
     { "G3", "FAX" },
+    { "G4", "FAX" },
     { "GIF87", "GIF" },
     { "G", "RAW" },
     { "GRANITE", "MAGICK" },