mcdiffview: code cleanup and cosmetics.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>

src/diffviewer/internal.h

@@ -136,7 +136,6 @@ typedef struct WDiff
         ssize_t last_found_line;
         ssize_t last_accessed_num_line;
     } search;
-
 } WDiff;
 
 /*** global variables defined in .c file *********************************************************/
@@ -147,7 +146,4 @@ typedef struct WDiff
 void dview_search_cmd (WDiff * dview);
 void dview_continue_search_cmd (WDiff * dview);
 
-/* ydiff.c */
-void dview_update (WDiff * dview);
-
 #endif /* MC__DIFFVIEW_INTERNAL_H */

src/diffviewer/ydiff.h

@@ -11,6 +11,6 @@
 
 /*** declarations of public functions ************************************************************/
 
-int dview_diff_cmd (const void *f0, const void *f1);
+gboolean dview_diff_cmd (const void *f0, const void *f1);
 
 #endif /* MC__DIFFVIEW_YDIFF_H */