[analyzer; alternate arrows] add back recording whether we visited the first edge.

llvm-svn: 181361

clang/lib/StaticAnalyzer/Core/BugReporter.cpp

@@ -1847,6 +1847,8 @@ static bool optimizeEdges(PathPieces &path, SourceManager &SM,
     const Stmt *level2 = getStmtParent(s1End, PM);
 
     if (wasFirst) {
+      wasFirst = false;
+
       // If the first edge (in isolation) is just a transition from
       // an expression to a parent expression then eliminate that edge.
       if (level1 && level2 && level2 == PM.getParent(level1)) {