Clean up err != nil usage

core/os/os2/file_util.odin

@@ -173,11 +173,8 @@ write_entire_file :: proc(name: string, data: []byte, perm: int, truncate := tru
 	if truncate {
 		flags |= O_TRUNC
 	}
-	f, err := open(name, flags, perm)
-	if err != nil {
-		return err
-	}
-	_, err = write(f, data)
+	f := open(name, flags, perm) or_return
+	_, err := write(f, data)
 	if cerr := close(f); cerr != nil && err == nil {
 		err = cerr
 	}

core/os/os2/stat_windows.odin

@@ -6,25 +6,22 @@ import "core:time"
 import "core:strings"
 import win32 "core:sys/windows"
 
-_fstat :: proc(f: ^File, allocator: runtime.Allocator) -> (File_Info, Error) {
+_fstat :: proc(f: ^File, allocator: runtime.Allocator) -> (fi: File_Info, err: Error) {
 	if f == nil || (^File_Impl)(f.impl).fd == nil {
-		return {}, nil
+		return
 	}
 
-	path, err := _cleanpath_from_handle(f, allocator)
-	if err != nil {
-		return {}, err
-	}
+	path := _cleanpath_from_handle(f, allocator) or_return
 
 	h := _handle(f)
 	switch win32.GetFileType(h) {
 	case win32.FILE_TYPE_PIPE, win32.FILE_TYPE_CHAR:
-		fi := File_Info {
+		fi = File_Info {
 			fullpath = path,
 			name = basename(path),
 			type = file_type(h),
 		}
-		return fi, nil
+		return
 	}
 
 	return _file_info_from_get_file_information_by_handle(path, h, allocator)