Fixed a couple of issues found by running Coverity

Author: doxygen

src/context.cpp

@@ -4046,11 +4046,11 @@ class MemberContext::Private : public DefinitionContext<MemberContext::Private>
         s_inst.addProperty("nameWithContextFor",  &Private::nameWithContextFor);
         init=TRUE;
       }
-      if (md && !md->cookie()) { md->setCookie(new MemberContext::Private::Cachable(md)); }
+      if (!md->cookie()) { md->setCookie(new MemberContext::Private::Cachable(md)); }
 
       Cachable &cache = getCache();
       cache.propertyAttrs.reset(TemplateList::alloc());
-      if (md && md->isProperty())
+      if (md->isProperty())
       {
         if (md->isGettable())           cache.propertyAttrs->append("get");
         if (md->isPrivateGettable())    cache.propertyAttrs->append("private get");
@@ -4060,7 +4060,7 @@ class MemberContext::Private : public DefinitionContext<MemberContext::Private>
         if (md->isProtectedSettable())  cache.propertyAttrs->append("protected set");
       }
       cache.eventAttrs.reset(TemplateList::alloc());
-      if (md && md->isEvent())
+      if (md->isEvent())
       {
         if (md->isAddable())   cache.eventAttrs->append("add");
         if (md->isRemovable()) cache.eventAttrs->append("remove");

src/docparser.cpp

@@ -829,6 +829,7 @@ inline void errorHandleDefaultToken(DocNode *parent,int tok,
   {
     case TK_COMMAND_AT:
       cmd_start = "@";
+      // fall through
     case TK_COMMAND_BS:
       children.push_back(std::make_unique<DocWord>(parent,TK_COMMAND_CHAR(tok) + g_token->name));
       warn_doc_error(g_fileName,getDoctokinizerLineNr(),"Illegal command %s as part of a %s",
@@ -1519,7 +1520,7 @@ static bool defaultHandleToken(DocNode *parent,int tok, DocNodeList &children,bo
           {
             QCString scope;
             doctokenizerYYsetStateSetScope();
-            doctokenizerYYlex();
+            (void)doctokenizerYYlex();
             scope = g_token->name;
             g_context = scope;
             //printf("Found scope='%s'\n",scope.data());

src/dotgroupcollaboration.cpp

@@ -288,6 +288,7 @@ void DotGroupCollaboration::Edge::write( FTextStream &t ) const
     {
       if (first) first=FALSE; else t << "\\n";
       t << DotNode::convertLabel(link.label);
+      count++;
     }
     if (count==maxLabels) t << "\\n...";
     t << "\"";

src/vhdldocgen.cpp

@@ -3046,8 +3046,9 @@ void  FlowChart::colTextNodes()
         const FlowChart &ftemp = flowList[j+1];
         if (ftemp.type & EMPTY)
         {
-          flowList.insert(flowList.begin()+j+1,FlowChart(TEXT_NO,"empty ",0));
-          flowList[j+1].stamp = flo.stamp;
+          FlowChart fc(TEXT_NO,"empty ",0);
+          fc.stamp = flo.stamp;
+          flowList.insert(flowList.begin()+j+1,fc);
         }
       }
     }