save-view: fix some printf format specifiers

Commit 175f658 ("Test diff stat parsing", 10-07-2017) added a new
'save-view' command to dump the view data as a facility to help in
debugging. In order to dump the data, some variables of type size_t
are printed using an '%ld' fprintf() format specifier. On 64-bit
platforms this is not a problem, since size_t is effectively the
same as an 'unsigned long int'. However, on 32-bit systems, this will
cause compiler warnings to be issued, since size_t is effectively an
'unsigned int' type. In order to print a size_t variable on both
platforms, without provoking compiler warnings, use the '%zu' format
specifier.

Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Jonas Fonseca <jonas.fonseca@gmail.com>

src/display.c

@@ -380,7 +380,7 @@ save_view(struct view *view, const char *path)
 	for (i = 0; i < view->lines; i++) {
 		struct line *line = &view->line[i];
 
-		fprintf(file, "line[%3ld] type=%s selected=%d\n",
+		fprintf(file, "line[%3zu] type=%s selected=%d\n",
 			i,
 			enum_name(get_line_type_name(line->type)),
 			line->selected);
@@ -393,7 +393,7 @@ save_view(struct view *view, const char *path)
 			size_t j;
 			size_t offset;
 
-			fprintf(file, "line[%3ld] cells=%ld text=",
+			fprintf(file, "line[%3zu] cells=%zu text=",
 				i, box->cells);
 
 			for (j = 0, offset = 0; j < box->cells; j++) {