maint: make spacing around "=" consistent, even in IF_LINT

E.g.,
  -  size_t desired_width IF_LINT (= 0);
  +  size_t desired_width IF_LINT ( = 0);
Use this command:
  g grep -l IF_LINT | grep '\.[ch]$' \
    | xargs perl -pi -e 's/(IF_LINT \()= /$1 = /'

1 files changed, 1 insertions, 1 deletions

diff --git a/src/cp.c b/src/cp.c
index cc958d192..035526922 100644
--- a/src/cp.c
+++ b/src/cp.c
@@ -405,7 +405,7 @@ make_dir_parents_private (char const *const_dir, size_t src_offset,
         slash++;
       while ((slash = strchr (slash, '/')))
         {
-          struct dir_attr *new IF_LINT (= NULL);
+          struct dir_attr *new IF_LINT ( = NULL);
           bool missing_dir;
 
           *slash = '\0';