[PATCH] Add a check to prevent max_children from being 0.

["Alex via GitGitGadget" <gitgitgadget@gmail.com>]

From: jinyaoguo <guo846@purdue.edu>

In function fetch_multiple and fetch_submodules, `multiple` is
stored in `opt.process` and later used as a divisor in function
`pp_collect_finished`, creating a potential divide-by-zero if it
remains zero.

Signed-off-by: Alex Guo <alexguo1023@gmail.com>
---
    Add a check to prevent max_children from being 0, which may cause
    potential divide-by-zero.

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1975%2Fmugitya03%2Fint2-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1975/mugitya03/int2-v1
Pull-Request: https://github.com/git/git/pull/1975

 builtin/fetch.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/builtin/fetch.c b/builtin/fetch.c
index cda6eaf1fd6..b668187627a 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -2591,7 +2591,7 @@ int cmd_fetch(int argc,
 			die(_("--stdin can only be used when fetching "
 			      "from one remote"));
 
-		if (max_children < 0)
+		if (max_children <= 0)
 			max_children = config.parallel;
 
 		/* TODO should this also die if we have a previous partial-clone? */
@@ -2613,9 +2613,9 @@ int cmd_fetch(int argc,
 		struct strvec options = STRVEC_INIT;
 		int max_children = max_jobs;
 
-		if (max_children < 0)
+		if (max_children <= 0)
 			max_children = config.submodule_fetch_jobs;
-		if (max_children < 0)
+		if (max_children <= 0)
 			max_children = config.parallel;
 
 		add_options_to_argv(&options, &config);

base-commit: 8613c2bb6cd16ef530dc5dd74d3b818a1ccbf1c0
-- 
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