[PATCH 2/2] nfs-utils: conffile: fix discards const from pointer target

[Rudi Heitbaum <rudi@heitbaum.com>]

end is used as the return from strchr(line) which is a const char and
then again as the return from strchr(name) which is a char pointer to
the strdup(line). Declare a const char * pounter for use in the first
case, addressing the warning.

fixes:
    conffile.c: In function 'is_tag':
    conffile.c:1711:13: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
     1711 |         end = strchr(line, '=');
          |             ^
    conffile.c: In function 'is_taggedcomment':
    conffile.c:1825:13: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
     1825 |         end = strchr(line, ':');
          |             ^

Signed-off-by: Rudi Heitbaum <rudi@heitbaum.com>
---
 support/nfs/conffile.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/support/nfs/conffile.c b/support/nfs/conffile.c
index 137fac8d..8d242c2f 100644
--- a/support/nfs/conffile.c
+++ b/support/nfs/conffile.c
@@ -1704,12 +1704,13 @@ static bool
 is_tag(const char *line, const char *tagname)
 {
 	char *end;
+	const char *equal;
 	char *name;
 	bool found = false;
 
 	/* quick check, is this even an assignment line */
-	end = strchr(line, '=');
-	if (end == NULL)
+	equal = strchr(line, '=');
+	if (equal == NULL)
 		return false;
 
 	/* skip leading white space before tag name */
@@ -1807,6 +1808,7 @@ static bool
 is_taggedcomment(const char *line, const char *field)
 {
 	char *end;
+	const char *equal;
 	char *name;
 	bool found = false;
 
@@ -1822,8 +1824,8 @@ is_taggedcomment(const char *line, const char *field)
 	line++;
 
 	/* quick check, is this even a likely formatted line */
-	end = strchr(line, ':');
-	if (end == NULL)
+	equal = strchr(line, ':');
+	if (equal == NULL)
 		return false;
 
 	/* skip leading white space before field name */
-- 
2.51.0