Fixed a handful of errors when extracting.

Fixed issues with unsquashfs

src/dir_entry.zig

@@ -30,17 +30,13 @@ pub fn readDir(alloc: std.mem.Allocator, rdr: *Reader, size: u32) ![]Entry {
     var cur_red: u32 = 3; // start at 3 due to "." & ".." being counted in the dir size.
     var hdr: Header = undefined;
     var raw: RawEntry = undefined;
-    var out: std.ArrayList(Entry) = try .initCapacity(alloc, 25); // Start out with capacity instead of needing to allocate per header.
+    var out: std.ArrayList(Entry) = try .initCapacity(alloc, 100); // Start out with a decent capacity instead of needing to allocate per header.
     errdefer out.deinit(alloc);
     while (cur_red < size) {
         try rdr.readSliceEndian(Header, @ptrCast(&hdr), .little);
         cur_red += @sizeOf(Header);
-        const count = hdr.count + 1;
-        if (out.capacity < count) {
-            // Make sure we have at least 25 capacity past current count.
-            try out.ensureUnusedCapacity(alloc, ((count % 25) + 2) * 25);
-        }
-        for (0..count) |_| {
+        try out.ensureUnusedCapacity(alloc, hdr.count + 1);
+        for (0..hdr.count + 1) |_| {
             try rdr.readSliceEndian(RawEntry, @ptrCast(&raw), .little);
             const name = try alloc.alloc(u8, raw.name_size + 1);
             errdefer alloc.free(name);