[Patch] BaseTools: Fix a bug about Structure PCD

["Feng, Bob C" <bob.c.feng@intel.com>]

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=1535
If there is Hii Structure Pcd, build will fail, root cause is that
there is an incorrect variable access method used in code.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
---
 BaseTools/Source/Python/Workspace/DscBuildData.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/BaseTools/Source/Python/Workspace/DscBuildData.py b/BaseTools/Source/Python/Workspace/DscBuildData.py
index e45beb3924..2e6eb16b08 100644
--- a/BaseTools/Source/Python/Workspace/DscBuildData.py
+++ b/BaseTools/Source/Python/Workspace/DscBuildData.py
@@ -2392,11 +2392,11 @@ class DscBuildData(PlatformBuildClassObject):
                 skuinfo = Pcd.SkuInfoList[skuname]
                 if skuinfo.VariableName:
                     for defaultstore in skuinfo.DefaultStoreDict:
                         pcddscrawdefaultvalue = self.GetPcdDscRawDefaultValue(Pcd, skuname, defaultstore)
                         if pcddscrawdefaultvalue:
-                            Value = skuinfo[defaultstore]
+                            Value = skuinfo.DefaultStoreDict[defaultstore]
                             if "{CODE(" in Value:
                                 realvalue = Value.strip()[6:-2] # "{CODE(").rstrip(")}"
                                 CApp += "static %s %s_%s_%s_%s_Value%s = %s;\n" % (Pcd.BaseDatumType,Pcd.TokenSpaceGuidCName,Pcd.TokenCName,skuname,defaultstore,Demesion,realvalue)
                 else:
                     pcddscrawdefaultvalue = self.GetPcdDscRawDefaultValue(Pcd, skuname, TAB_DEFAULT_STORES_DEFAULT)
-- 
2.20.1.windows.1