MDEV-19740: Silence a bogus "may be uninitialized" warning

extra/innochecksum.cc

@@ -1590,10 +1590,8 @@ int main(
 	byte*		xdes = NULL;
 	/* bytes read count */
 	ulint		bytes;
-	/* current time */
-	time_t		now;
 	/* last time */
-	time_t		lastt;
+	time_t		lastt = 0;
 	/* stat, to get file size. */
 #ifdef _WIN32
 	struct _stat64	st;
@@ -1946,7 +1944,6 @@ int main(
 		/* main checksumming loop */
 		cur_page_num = start_page ? start_page : cur_page_num + 1;
 
-		lastt = 0;
 		while (!feof(fil_in)) {
 
 			bytes = read_file(buf, partial_page_read,
@@ -2026,12 +2023,10 @@ int main(
 
 			if (verbose && !read_from_stdin) {
 				if ((cur_page_num % 64) == 0) {
-					now = time(0);
+					time_t now = time(0);
 					if (!lastt) {
 						lastt= now;
-					}
-					if (now - lastt >= 1
-					    && is_log_enabled) {
+					} else if (now - lastt >= 1 && is_log_enabled) {
 						fprintf(log_file, "page::%llu "
 							"okay: %.3f%% done\n",
 							(cur_page_num - 1),