src/main.c: Fix missing "const" specifier

Fixes:

      CC       src/marquee-main.o
    src/main.c:34:29: warning: initialization discards ‘const’ qualifier from pointer target type
     static gchar *opt_profile = "default";
                                 ^

1 files changed, 1 insertions, 1 deletions

diff --git a/src/main.c b/src/main.c
index 07cac5a..3b1a34c 100644
--- a/src/main.c
+++ b/src/main.c
@@ -31,7 +31,7 @@
 
 extern const char *PACKAGE_VERSION_GIT;
 
-static gchar *opt_profile = "default";
+static const gchar *opt_profile = "default";
 static gboolean opt_private;
 static gboolean opt_version;
 static const gchar **opt_uris;