add comments

git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@4743 9d0c8265-081b-0410-96cb-a4ca84ce46f8

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/libpm.c b/lib/libpm.c
index b27b47d5..21d869a5 100644
--- a/lib/libpm.c
+++ b/lib/libpm.c
@@ -855,6 +855,11 @@ pm_parse_width(const char * const arg) {
 
    See comments at 'validateComputableSize' in libpam.c for details on
    the purpose of these validations.
+
+   This isn't just for Netpbm format images.
+
+   Typical places from which widths come: headers of non-Netpbm images;
+   command line options.
 -----------------------------------------------------------------------------*/
     unsigned int width;
     const char * error;