[GSOC][PATCH v2 3/6] apply: do a typecast to eliminate warnings

[Zejun Zhao <jelly.zhao.42@gmail.com>]

`git_hdr_len` is an `int` variable that can be negative and is used to
compare against a `len` of `size_t`, which will trigger
-Wsign-comparison warnings

Cast `git_hdr_len` to `size_t` after an above-zero check.

Signed-off-by: Zejun Zhao <jelly.zhao.42@gmail.com>
---
 apply.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apply.c b/apply.c
index b4ae74a5fb..605a0aa2e3 100644
--- a/apply.c
+++ b/apply.c
@@ -1592,7 +1592,7 @@ static int find_header(struct apply_state *state,
 								size, patch);
 			if (git_hdr_len < 0)
 				return -128;
-			if (git_hdr_len <= len)
+			if ((size_t) git_hdr_len <= len)
 				continue;
 			*hdrsize = git_hdr_len;
 			return offset;
-- 
2.43.0