Merge pull request #2383 from dnc40085/dev_file.read()_retval_fix

Fix for lack of nil return in file.read() when EOF is reached

app/modules/file.c

@@ -432,7 +432,8 @@ static int file_g_read( lua_State* L, int n, int16_t end_char, int fd )
       luaM_free(L, heap_mem);
       heap_mem = NULL;
     }
-    return 0;
+    lua_pushnil(L);
+    return 1;
   }
 
   vfs_lseek(fd, -(n - i), VFS_SEEK_CUR);