#30 Improve "const correctness"

[Markus Elfring]

Would you like to apply the advices from the article
"http://en.wikipedia.org/wiki/Const_correctness" to
your sources?
I suggest to add the key word "const" to the type
specifiers for parameters like the following examples.
-
http://cvs.sourceforge.net/viewcvs.py/robodoc/robo/Source/directory.h?rev=1.20&view=markup
path, filename (function "RB_Is_Source_File")
filename (functions "RB_To_Be_Skipped",
"RB_Not_Accepted")
arg_fullpath (function "RB_Get_.+")
p1, p2 (function "RB_.+_Compare")
arg_rb_directory (function "RB_Number_Of_.+")

-
http://cvs.sourceforge.net/viewcvs.py/robodoc/robo/Source/generator.h?rev=1.22&view=markup
src_name, title, toc, dest_name, charset (function
"RB_Generate_Doc_Start")
name (functions "RB_Generate_Item_.+")

-
http://cvs.sourceforge.net/viewcvs.py/robodoc/robo/Source/path.h?rev=1.8&view=markup
arg_pathname (function "RB_Get_RB_Path")
arg_current_path, arg_subdirectory (function
"RB_Get_RB_Path2")

[Markus Elfring]

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How do you think about the appended corrections?

[Markus Elfring]

differences from 8 changed files