Fix incorrect format placeholders

Before commit a0ed19e0a9 there was a cast around these, but the cast
inadvertently changed the signedness, but that made the format
placeholder correct.  Commit a0ed19e0a9 removed the casts, so now the
format placeholders had the wrong signedness.

src/fe_utils/print.c

@@ -3185,7 +3185,7 @@ printTableInit(printTableContent *const content, const printTableOpt *opt,
 	/* Catch possible overflow.  Using >= here allows adding 1 below */
 	if (total_cells >= SIZE_MAX / sizeof(*content->cells))
 	{
-		fprintf(stderr, _("Cannot print table contents: number of cells %" PRId64 " is equal to or exceeds maximum %zu.\n"),
+		fprintf(stderr, _("Cannot print table contents: number of cells %" PRIu64 " is equal to or exceeds maximum %zu.\n"),
 				total_cells,
 				SIZE_MAX / sizeof(*content->cells));
 		exit(EXIT_FAILURE);
@@ -3269,7 +3269,7 @@ printTableAddCell(printTableContent *const content, char *cell,
 	total_cells = (uint64) content->ncolumns * content->nrows;
 	if (content->cellsadded >= total_cells)
 	{
-		fprintf(stderr, _("Cannot add cell to table content: total cell count of %" PRId64 " exceeded.\n"),
+		fprintf(stderr, _("Cannot add cell to table content: total cell count of %" PRIu64 " exceeded.\n"),
 				total_cells);
 		exit(EXIT_FAILURE);
 	}