Fix typo open_table_def()

sql/table.cc

@@ -540,14 +540,14 @@ inline bool is_system_table_name(const char *name, uint length)
   
   SYNOPSIS
   open_table_def()
-  thd		Thread handler
+  thd		  Thread handler
   share		Fill this with table definition
-  db_flags	Bit mask of the following flags: OPEN_VIEW
+  flags	  Bit mask of the following flags: OPEN_VIEW
 
   NOTES
     This function is called when the table definition is not cached in
     table definition cache
-    The data is returned in 'share', which is alloced by
+    The data is returned in 'share', which is allocated by
     alloc_table_share().. The code assumes that share is initialized.
 */