cryptsetup: explicitl set default log functions wherever needed

Code using libcryptsetup already sets the global log function if it uses
dlopen_cryptsetup(). Make sure we do the same for the three programs
that explicitly link against libcryptsetup and hence to not use
dlopen_cryptsetup().

src/cryptenroll/cryptenroll.c

@@ -510,6 +510,8 @@ static int run(int argc, char *argv[]) {
         if (r <= 0)
                 return r;
 
+        cryptsetup_enable_logging(NULL);
+
         if (arg_enroll_type < 0)
                 r = prepare_luks(&cd, NULL, NULL); /* No need to unlock device if we don't need the volume key because we don't need to enroll anything */
         else

src/cryptsetup/cryptsetup.c

@@ -1449,7 +1449,7 @@ static int run(int argc, char *argv[]) {
 
         log_setup();
 
-        cryptsetup_enable_logging(cd);
+        cryptsetup_enable_logging(NULL);
 
         umask(0022);
 

src/veritysetup/veritysetup.c

@@ -138,6 +138,8 @@ static int run(int argc, char *argv[]) {
 
         log_setup();
 
+        cryptsetup_enable_logging(NULL);
+
         umask(0022);
 
         if (streq(argv[1], "attach")) {