Fixed #4778 (FP: Uninitialized variable: av)

lib/checkuninitvar.cpp

@@ -1542,7 +1542,7 @@ bool CheckUninitVar::isVariableUsage(const Token *vartok, bool pointer, bool cpp
         // is there something like: ; "*((&var ..expr.. ="  => the variable is assigned
         if (vartok->previous()->str() == "&") {
             const Token *tok2 = vartok->tokAt(-2);
-            if (tok2 && (tok2->isConstOp() || tok2->str() == "("))
+            if (tok2 && (tok2->isConstOp() || Token::Match(tok2, "[;{}(]")))
                 return false; // address of
             if (tok2 && tok2->str() == ")")
                 tok2 = tok2->link()->previous();

test/testuninitvar.cpp

@@ -2376,6 +2376,12 @@ private:
                         "}");
         ASSERT_EQUALS("", errout.str());
 
+        checkUninitVar2("void f() {\n" // #4778 - cast address of uninitialized variable
+                        "    long a;\n"
+                        "    &a;\n"
+                        "}\n");
+        ASSERT_EQUALS("", errout.str());
+
         checkUninitVar2("void f() {\n" // #4717 - ({})
                         "    int a = ({ long b = (long)(123); 2 + b; });\n"
                         "}", "test.c", false);