apps,nanos-lite,fs: better initialization code

apps/nanos-lite/src/fs.c

@@ -7,19 +7,20 @@ typedef struct {
 	off_t open_offset;
 } Finfo;
 
+enum {FD_STDIN, FD_STDOUT, FD_STDERR, FD_FB, FD_EVENTS, FD_DISPINFO, FD_NORMAL};
+
 /* This is the information about all files in disk. */
 static Finfo file_table[] __attribute__((used)) = {
   {"stdin (note that this is not the actual stdin)", 0, 0},
   {"stdout (note that this is not the actual stdout)", 0, 0},
   {"stderr (note that this is not the actual stderr)", 0, 0},
-  {"/dev/fb", 0, 0},
-  {"/dev/events", 0, 0},
-  {"/proc/dispinfo", 128, 0},
+  [FD_FB] = {"/dev/fb", 0, 0},
+  [FD_EVENTS] = {"/dev/events", 0, 0},
+  [FD_DISPINFO] = {"/proc/dispinfo", 128, 0},
 #include "files.h"
 };
 
 #define NR_FILES (sizeof(file_table) / sizeof(file_table[0]))
-enum {FD_STDIN, FD_STDOUT, FD_STDERR, FD_FB, FD_EVENTS, FD_DISPINFO, FD_NORMAL};
 
 void init_fs() {
   file_table[FD_FB].size = _screen.width * _screen.height * sizeof(uint32_t);