refactor: use CLEAR_FIELD and CLEAR_POINTER macros (#19709)

vim-patch:8.2.0559: clearing a struct is verbose

Problem:    Clearing a struct is verbose.
Solution:   Define and use CLEAR_FIELD() and CLEAR_POINTER().
https://github.com/vim/vim/commit/a80faa8930ed5a554beeb2727762538873135e83

1 files changed, 5 insertions, 5 deletions

diff --git a/src/nvim/diff.c b/src/nvim/diff.c
index 849204f789..e3a6f9039d 100644
--- a/src/nvim/diff.c
+++ b/src/nvim/diff.c
@@ -956,13 +956,13 @@ void ex_diffupdate(exarg_T *eap)
 
   // Only use the internal method if it did not fail for one of the buffers.
   diffio_T diffio;
-  memset(&diffio, 0, sizeof(diffio));
+  CLEAR_FIELD(diffio);
   diffio.dio_internal = diff_internal() && !diff_internal_failed();
 
   diff_try_update(&diffio, idx_orig, eap);
   if (diffio.dio_internal && diff_internal_failed()) {
     // Internal diff failed, use external diff instead.
-    memset(&diffio, 0, sizeof(diffio));
+    CLEAR_FIELD(diffio);
     diff_try_update(&diffio, idx_orig, eap);
   }
 
@@ -1075,9 +1075,9 @@ static int diff_file_internal(diffio_T *diffio)
   xdemitconf_t emit_cfg;
   xdemitcb_t emit_cb;
 
-  memset(&param, 0, sizeof(param));
-  memset(&emit_cfg, 0, sizeof(emit_cfg));
-  memset(&emit_cb, 0, sizeof(emit_cb));
+  CLEAR_FIELD(param);
+  CLEAR_FIELD(emit_cfg);
+  CLEAR_FIELD(emit_cb);
 
   param.flags = (unsigned long)diff_algorithm;