Problem: Alloc() returning "char_u *" causes a lot of type casts.
Solution: Have it return "void *". (Mike Williams) Define ALLOC_ONE() to
check the simple allocations.
Problem: Using "int" for alloc() often results in compiler warnings.
Solution: Use "size_t" and remove type casts. Remove alloc_check(), Vim
only works with 32 bit ints anyway.
Problem: A BufReadPre autocommand may cause the cursor to move.
Solution: Restore the cursor position after executing the autocommand,
unless the autocommand moved it. (Christian Brabandt,
closes#4302, closes#4294)
Problem: Making an autocommand trigger once is not so easy.
Solution: Add the ++once argument. Also add ++nested as an alias for
"nested". (Justin M. Keyes, closes#4100)
