[groff] 42/48: src/roff/troff/env.cpp: Fix code style nit.

[G. Branden Robinson]

gbranden pushed a commit to branch master
in repository groff.

commit c8ac431a180ee1e720f7a8edbaca75899701e87b
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Sat Apr 27 04:21:21 2024 -0500

    src/roff/troff/env.cpp: Fix code style nit.
    
    * src/roff/troff/env.cpp (environment::add_italic_correction): Fix code
      style nit (in de-configured code); explicitly compare variable of
      pointer type to null pointer constant instead of letting it pun down
      to a Boolean.
    
      (environment::output) [WIDOW_CONTROL]: Same, in deconfigured code.
    
    Annotate null pointer with `nullptr` comment to ease any future
    transition to C++11, which defines it as a keyword.
---
 ChangeLog              | 7 +++++++
 src/roff/troff/env.cpp | 4 ++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 191afe401..79b3c0174 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2024-04-27  G. Branden Robinson <g.branden.robinson@gmail.com>
+
+       * src/roff/troff/env.cpp (environment::output) [WIDOW_CONTROL]:
+       Fix code style nit (in de-configured code); explicitly compare
+       variable of pointer type to null pointer constant instead of
+       letting it pun down to a Boolean.
+
 2024-04-27  G. Branden Robinson <g.branden.robinson@gmail.com>
 
        [troff]: Trivially refactor.  Rename member functions and
diff --git a/src/roff/troff/env.cpp b/src/roff/troff/env.cpp
index 23ab6c115..46362e27c 100644
--- a/src/roff/troff/env.cpp
+++ b/src/roff/troff/env.cpp
@@ -142,7 +142,7 @@ void environment::output(node *nd, bool suppress_filling,
                         hunits width, bool was_centered)
 {
 #ifdef WIDOW_CONTROL
-  while (pending_lines) {
+  while (pending_lines != 0 /* nullptr */) {
     if (want_widow_control && !pending_lines->suppress_filling
        && !pending_lines->next)
       break;
@@ -453,7 +453,7 @@ const char *environment::get_input_trap_macro()
 void environment::add_italic_correction()
 {
   if (current_tab) {
-    if (tab_contents)
+    if (tab_contents != 0 /* nullptr */)
       tab_contents = tab_contents->add_italic_correction(&tab_width);
   }
   else if (line)