os: Fix casting errors in other files

core/os/file_windows.odin

@@ -349,7 +349,7 @@ exists :: proc(path: string) -> bool {
 	wpath := win32.utf8_to_wstring(path, context.temp_allocator)
 	attribs := win32.GetFileAttributesW(wpath)
 
-	return i32(attribs) != win32.INVALID_FILE_ATTRIBUTES
+	return attribs != win32.INVALID_FILE_ATTRIBUTES
 }
 
 is_file :: proc(path: string) -> bool {
@@ -357,7 +357,7 @@ is_file :: proc(path: string) -> bool {
 	wpath := win32.utf8_to_wstring(path, context.temp_allocator)
 	attribs := win32.GetFileAttributesW(wpath)
 
-	if i32(attribs) != win32.INVALID_FILE_ATTRIBUTES {
+	if attribs != win32.INVALID_FILE_ATTRIBUTES {
 		return attribs & win32.FILE_ATTRIBUTE_DIRECTORY == 0
 	}
 	return false
@@ -368,7 +368,7 @@ is_dir :: proc(path: string) -> bool {
 	wpath := win32.utf8_to_wstring(path, context.temp_allocator)
 	attribs := win32.GetFileAttributesW(wpath)
 
-	if i32(attribs) != win32.INVALID_FILE_ATTRIBUTES {
+	if attribs != win32.INVALID_FILE_ATTRIBUTES {
 		return attribs & win32.FILE_ATTRIBUTE_DIRECTORY != 0
 	}
 	return false