smtp: move constant declaration to header

src/app-layer-smtp.c

@@ -111,8 +111,6 @@
 #define SMTP_EHLO_EXTENSION_DSN
 #define SMTP_EHLO_EXTENSION_STARTTLS
 #define SMTP_EHLO_EXTENSION_8BITMIME
-/* Limit till the data would be buffered in current line */
-#define SMTP_LINE_BUFFER_LIMIT 4096
 
 typedef struct SMTPInput_ {
     /* current input that is being parsed */

src/app-layer-smtp.h

@@ -28,6 +28,9 @@
 #include "util-streaming-buffer.h"
 #include "rust.h"
 
+/* Limit till the data would be buffered in current line */
+#define SMTP_LINE_BUFFER_LIMIT 4096
+
 enum {
     SMTP_DECODER_EVENT_INVALID_REPLY,
     SMTP_DECODER_EVENT_UNABLE_TO_MATCH_REPLY_WITH_REQUEST,