Fix const char warnings in calls to isabbreviation()

gcc warned on every call:

xgamma.c: In function ‘main’:
xgamma.c:107:6: warning: passing argument 1 of ‘isabbreviation’ discards
 ‘const’ qualifier from pointer target type [enabled by default]
      if (isabbreviation ("-display", arg, 1)) {
      ^
xgamma.c:70:1: note: expected ‘char *’ but argument is of type ‘const char *’
 isabbreviation(char *arg, char *s, size_t minslen)
 ^

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/xgamma.c b/xgamma.c
index 9988575..54eeec7 100644
--- a/xgamma.c
+++ b/xgamma.c
@@ -67,7 +67,7 @@ Syntax(void)
  */
 
 static Bool 
-isabbreviation(char *arg, char *s, size_t minslen)
+isabbreviation(const char *arg, const char *s, size_t minslen)
 {
     size_t arglen;
     size_t slen;