:digraphs : check for CTRL-C less often #10376

No need to do this so frequently.

src/nvim/digraph.c

@@ -18,6 +18,7 @@
 #include "nvim/ex_docmd.h"
 #include "nvim/ex_getln.h"
 #include "nvim/getchar.h"
+#include "nvim/misc1.h"
 #include "nvim/mbyte.h"
 #include "nvim/message.h"
 #include "nvim/memory.h"
@@ -1663,13 +1664,13 @@ void listdigraphs(void)
       printdigraph(&tmp);
     }
     dp++;
-    os_breakcheck();
+    fast_breakcheck();
   }
 
   dp = (digr_T *)user_digraphs.ga_data;
   for (int i = 0; i < user_digraphs.ga_len && !got_int; ++i) {
     printdigraph(dp);
-    os_breakcheck();
+    fast_breakcheck();
     dp++;
   }
 }