[PATCH] fsmonitor: avoid signed integer overflow / infinite loop

[Carlo Marcelo Arenas Belón]

883e248b8a ("fsmonitor: teach git to optionally utilize a file system
monitor to speed up detecting new or changed files.", 2017-09-22) uses
an int in a loop that would wrap if index_state->cache_nr (unsigned)
is bigger than INT_MAX

Signed-off-by: Carlo Marcelo Arenas Belón <care...@gmail.com>
---
 fsmonitor.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/fsmonitor.c b/fsmonitor.c
index 1dee0aded1..231e83a94d 100644
--- a/fsmonitor.c
+++ b/fsmonitor.c
@@ -56,7 +56,7 @@ int read_fsmonitor_extension(struct index_state *istate, 
const void *data,
 
 void fill_fsmonitor_bitmap(struct index_state *istate)
 {
-       int i;
+       unsigned int i;
        istate->fsmonitor_dirty = ewah_new();
        for (i = 0; i < istate->cache_nr; i++)
                if (!(istate->cache[i]->ce_flags & CE_FSMONITOR_VALID))
@@ -134,7 +134,7 @@ void refresh_fsmonitor(struct index_state *istate)
        size_t bol; /* beginning of line */
        uint64_t last_update;
        char *buf;
-       int i;
+       unsigned int i;
 
        if (!core_fsmonitor || istate->fsmonitor_has_run_once)
                return;
@@ -192,7 +192,7 @@ void refresh_fsmonitor(struct index_state *istate)
 
 void add_fsmonitor(struct index_state *istate)
 {
-       int i;
+       unsigned int i;
 
        if (!istate->fsmonitor_last_update) {
                trace_printf_key(&trace_fsmonitor, "add fsmonitor");
@@ -225,7 +225,7 @@ void remove_fsmonitor(struct index_state *istate)
 
 void tweak_fsmonitor(struct index_state *istate)
 {
-       int i;
+       unsigned int i;
        int fsmonitor_enabled = git_config_get_fsmonitor();
 
        if (istate->fsmonitor_dirty) {
-- 
2.22.0