Add fixed.texi as octave-fixed.info into info structure (bug fix for 502295)
--- a/doc/fixed.texi
+++ b/doc/fixed.texi
@@ -3,10 +3,15 @@
 @c Include the file with the version number 
 @include fixedversion.txi
 
-@setfilename fixed.info
+@setfilename octave-fixed.info
 
 @settitle Fixed Point Toolbox for Octave
 
+@dircategory Math
+@direntry
+* Octave-Fixed: (octave-fixed).      Fixed Point Toolbox for Octave
+@end direntry
+
 @titlepage
 @title  Fixed Point Toolbox for Octave
 @subtitle Version @value{VERSION}
