more miscellaneous breakage fixes

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2863 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

src/files.c

@@ -230,7 +230,15 @@ void open_buffer(const char *filename)
 /* Update the screen to account for the current buffer. */
 void display_buffer(void)
 {
+    /* Update the titlebar, since the filename may have changed. */
     titlebar(NULL);
+
+#ifdef ENABLE_COLOR
+    /* Update the buffer's associated colors, if applicable. */
+    color_update();
+#endif
+
+    /* Update the edit window. */
     edit_refresh();
 }
 

src/nano.c

@@ -191,7 +191,7 @@ void renumber(filestruct *fileptr)
     assert(fileptr != fileptr->next);
 
     for (; fileptr != NULL; fileptr = fileptr->next)
-	fileptr->lineno = ++line;
+	fileptr->lineno = line++;
 }
 
 /* Partition a filestruct so it begins at (top, top_x) and ends at (bot,

src/winio.c

@@ -3510,7 +3510,7 @@ int need_vertical_update(size_t old_pww)
  * two is the current line at either time. */
 void edit_scroll(updown direction, int nlines)
 {
-    filestruct *foo;
+    const filestruct *foo;
     int i, scroll_rows = 0;
 
     /* Scrolling less than one line or more than editwinrows lines is