lib-mail: test-message-parser - Convert to signed when calculating variance

Satisfies runtime analyser, broken in 6b60e5ed490

diff --git a/src/lib-mail/test-message-parser.c b/src/lib-mail/test-message-parser.c
index d8134665cbc01a5f5de07a08cfee10f450ab73c9..b99fc74dd161612d8582b7848e7654df8252edb2 100644 (file)
--- a/src/lib-mail/test-message-parser.c
+++ b/src/lib-mail/test-message-parser.c
@@ -1092,7 +1092,7 @@ static const char *const input_msgs[] = {
        pool_t pool;
 
        for (size_t i = 0; i < N_ELEMENTS(input_msgs); i++) {
-               int variance = strlen(input_msgs[i]) - strlen(input_msgs[0]);
+               ssize_t variance = (ssize_t)strlen(input_msgs[i]) - (ssize_t)strlen(input_msgs[0]);
                pool = pool_alloconly_create("message parser", 10240);
                input = test_istream_create(input_msgs[i]);