[Patch 1/3] BaseTools/PatchCheck: Ignore blank lines in diff

["Michael D Kinney" <michael.d.kinney@intel.com>]

https://bugzilla.tianocore.org/show_bug.cgi?id=2044

When fixes are made for incorrect line endings, there
are cases where the diff contains blank lines.  Ignore
these blank lines.

Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
---
 BaseTools/Scripts/PatchCheck.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/BaseTools/Scripts/PatchCheck.py b/BaseTools/Scripts/PatchCheck.py
index 6aec15d0f0..4f2ef81ae7 100755
--- a/BaseTools/Scripts/PatchCheck.py
+++ b/BaseTools/Scripts/PatchCheck.py
@@ -270,6 +270,7 @@ class GitDiffCheck:
             if line.startswith('@@ '):
                 self.state = PRE_PATCH
             elif len(line) >= 1 and line[0] not in ' -+' and \
+                 not line.startswith('\r\n') and  \
                  not line.startswith(r'\ No newline ') and not self.binary:
                 for line in self.lines[self.line_num + 1:]:
                     if line.startswith('diff --git'):
@@ -313,6 +314,8 @@ class GitDiffCheck:
                 pass
             elif line.startswith('+'):
                 self.check_added_line(line[1:])
+            elif line.startswith('\r\n'):
+                pass
             elif line.startswith(r'\ No newline '):
                 pass
             elif not line.startswith(' '):
-- 
2.21.0.windows.1