Fix invalid size checks for size and download-size for spawned backends

Up to MAXUINT64 is supported

Author: sidt4

src/pk-backend-spawn.c

@@ -195,16 +195,16 @@ pk_backend_spawn_parse_stdout (PkBackendSpawn *backend_spawn,
 		group = pk_group_enum_from_string (sections[4]);
 
 		/* ITS4: ignore, checked for overflow */
-		package_size = atol (sections[7]);
-		if (package_size > 1073741824) {
-			g_set_error_literal (error, 1, 0,
-					     "package size cannot be that large");
+		if (!pk_strtoulong (sections[7], &package_size)) {
+			g_set_error (error, 1, 0,
+				     "failed to parse package size: '%s'",
+				     sections[7]);
 			return FALSE;
 		}
-		download_size = atol (sections[8]);
-		if (download_size > 1073741824) {
-			g_set_error_literal (error, 1, 0,
-					     "download size cannot be that large");
+		if (!pk_strtoulong (sections[8], &download_size)) {
+			g_set_error (error, 1, 0,
+				     "failed to parse download size: '%s'",
+				     sections[7]);
 			return FALSE;
 		}