1.修复了一些类的isTerminal没有被初始化的bug

2.修复了一些地方判断下一个Terminal的bug
Signed-off-by: facat@lab.com <facat@lab.com>

testHasttable/testHasttable.pro

@@ -29,7 +29,8 @@ SOURCES += main.cpp \
     disconnector.cpp \
     powertransformer.cpp \
     synchronousmachine.cpp \
-    nodetoterminal.cpp
+    nodetoterminal.cpp \
+    topologyrecorder.cpp
 
 HEADERS += \
     elementhashtable.h \
@@ -44,7 +45,8 @@ HEADERS += \
     disconnector.h \
     powertransformer.h \
     synchronousmachine.h \
-    nodetoterminal.h
+    nodetoterminal.h \
+    topologyrecorder.h
 
 #release{
 DEFINES += QT_NO_DEBUG_OUTPUT