Fix #4478: FP: Uninitialized variable

Author: olabetskyi

Diff for: lib/checkuninitvar.cpp

@@ -1653,6 +1653,8 @@ void CheckUninitVar::valueFlowUninit()
                 if (!v->subexpressions.empty() && usage == ExprUsage::PassedByReference)
                     continue;
                 if (usage != ExprUsage::Used) {
+                    if (tok->isUnaryOp("&") && !tok->astParent())
+                        continue;
                     if (!(Token::Match(tok->astParent(), ". %name% (|[") && uninitderef) &&
                         isVariableChanged(tok, v->indirect, *mSettings))
                         continue;

Diff for: test/testuninitvar.cpp

@@ -4304,7 +4304,7 @@ class TestUninitVar : public TestFixture {
                         "    long a;\n"
                         "    &a;\n"
                         "}");
-        TODO_ASSERT_EQUALS("", "[test.cpp:3]: (error) Uninitialized variable: &a\n", errout_str());
+        ASSERT_EQUALS("", errout_str());
 
         valueFlowUninit("void f() {\n" // #4717 - ({})
                         "    int a = ({ long b = (long)(123); 2 + b; });\n"