make all header files self-contained and include it in the source file

Including the header in the source file guarantees matching signatures,
thus preventing subtle errors.

Self-contained headers document the required headers and makes using it
easier to use the header in new source files.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/mark.c b/src/mark.c
index 754e4f0..5d2eb19 100644
--- a/src/mark.c
+++ b/src/mark.c
@@ -26,6 +26,8 @@
  ****************************************************************
  */
 
+#include "mark.h"
+
 #include <sys/types.h>
 #include <ctype.h>
 #include <stdbool.h>
@@ -37,7 +39,6 @@
 
 #include "encoding.h"
 #include "fileio.h"
-#include "mark.h"
 #include "process.h"
 #include "search.h"