[7.0.0] ijar: Widen some size types. (bazelbuild#19995)

This is a follow up to
bazelbuild@ac10bac.

Closes bazelbuild#19722.

Commit
bazelbuild@a69fdb8

PiperOrigin-RevId: 577864132
Change-Id: I4b7165b6abfd55f545811bd16c8e5cf02ae183ae

Co-authored-by: Benjamin Peterson <[email protected]>

Author: bazel-io

third_party/ijar/zip_main.cc

@@ -254,10 +254,14 @@ char **read_filelist(char *filename) {
   }
 
   int nb_entries = 1;
-  for (int i = 0; i < file_stat.total_size; i++) {
+  for (u8 i = 0; i < file_stat.total_size; i++) {
     if (data[i] == '\n') {
       nb_entries++;
     }
+    if (nb_entries == INT_MAX) {
+      fprintf(stderr, "too many input files");
+      return NULL;
+    }
   }
 
   size_t sizeof_array = sizeof(char *) * (nb_entries + 1);
@@ -271,7 +275,7 @@ char **read_filelist(char *filename) {
   // Create the corresponding array
   int j = 1;
   filelist[0] = content;
-  for (int i = 0; i < file_stat.total_size; i++) {
+  for (u8 i = 0; i < file_stat.total_size; i++) {
     if (content[i] == '\n') {
       content[i] = 0;
       if (i + 1 < file_stat.total_size) {