busctl: make parameter const

it's initialized from an argv[] entry, hence let's be make it
non-writable by default.

diff --git a/src/busctl/busctl.c b/src/busctl/busctl.c
index f9b23514c1e64ede1051616e666a5b64dfc8be94..69aae726b39ccfcf037ede569410eeaf78176372 100644 (file)
--- a/src/busctl/busctl.c
+++ b/src/busctl/busctl.c
@@ -29,7 +29,7 @@
 
 static bool arg_no_pager = false;
 static bool arg_legend = true;
-static char *arg_address = NULL;
+static const char *arg_address = NULL;
 static bool arg_unique = false;
 static bool arg_acquired = false;
 static bool arg_activatable = false;