Fix a K9 error.Result of GetVariable2() function that may return NULL will be dereferenced.

Signed-off-by: Wu Jiaxin <jiaxin.wu@intel.com >
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Dong Guo <guo.dong@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14813 6f19259b-4bc3-4df7-8a09-765794883524
Fix a K9 error.Result of GetVariable2() function that may return NULL will be dereferenced.

Signed-off-by: Wu Jiaxin <jiaxin.wu@intel.com >
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Dong Guo <guo.dong@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14814 6f19259b-4bc3-4df7-8a09-765794883524
Clean the help string and hot key info if an empty form is painting.

Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14815 6f19259b-4bc3-4df7-8a09-765794883524
ShellPkg: Properly set lasterror environment variable
- Set lasterror value based on platform width
- Use “lasterror” rather than “Lasterror” for variable name to match Shell Specification
- Set lasterror value when a binary or script file is not found

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chris Phillips <chrisp@hp.com>
Reviewed-by: Jaben Carsey <Jaben.Carsey@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14816 6f19259b-4bc3-4df7-8a09-765794883524
OptionRomPkg: Added bus driver for FTDI USB to serial adapters

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ashley DeSimone <ashley.e.desimone@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14817 6f19259b-4bc3-4df7-8a09-765794883524
Merge branch 'master' of https://github.com/tianocore/edk2