[dmd-internals] [D-Programming-Language/dmd] 500501: Use correct size for sizeTy[Tvector]

[GitHub via dmd-internals]

  Branch: refs/heads/master
  Home:   https://github.com/D-Programming-Language/dmd
  Commit: 500501cf03d764e7fa6756ba3268bcfcee5e4866
      https://github.com/D-Programming-Language/dmd/commit/500501cf03d764e7fa6756ba3268bcfcee5e4866
  Author: Safety0ff <safety0ff.dev at gmail.com>
  Date:   2015-02-23 (Mon, 23 Feb 2015)

  Changed paths:
    M src/mtype.c

  Log Message:
  -----------
  Use correct size for sizeTy[Tvector]

This bug causes https://github.com/ldc-developers/ldc/issues/825 :
When using ```Type::nullAttributes``` to create a new ```TypeVector```, it will read past the end of the source ```TypeVector``` if it was allocated using ```new TypeVector``` (i.e. the actual size is used for allocation) since ```sizeof(TypeVector)``` is less than ```sizeof(TypeBasic)```.


  Commit: 76b2be5e9a5c3d6e64ee007b8c94f8041f948253
      https://github.com/D-Programming-Language/dmd/commit/76b2be5e9a5c3d6e64ee007b8c94f8041f948253
  Author: Daniel Murphy <yebblies at gmail.com>
  Date:   2015-02-23 (Mon, 23 Feb 2015)

  Changed paths:
    M src/mtype.c

  Log Message:
  -----------
  Merge pull request #4436 from Safety0ff/patch-1

Use correct size for sizeTy[Tvector]


Compare: https://github.com/D-Programming-Language/dmd/compare/fcbe578f2f2c...76b2be5e9a5c