Fixed #2226 (segmentation fault of cppcheck)

lib/checkuninitvar.cpp

@@ -790,13 +790,15 @@ private:
             const Token *tok2;
 
             // parse setup
-            for (tok2 = tok.tokAt(3); tok2; tok2 = tok2->next())
+            for (tok2 = tok.tokAt(3); tok2 != tok.link(); tok2 = tok2->next())
             {
                 if (tok2->str() == ";")
                     break;
                 if (tok2->varId())
                     varid1.insert(tok2->varId());
             }
+            if (tok2 == tok.link())
+                return &tok;
 
             // parse condition
             if (Token::Match(tok2, "; %var% <|<=|>=|> %num% ;"))

test/testuninitvar.cpp

@@ -757,6 +757,15 @@ private:
                        "    a++;"
                        "}\n");
         ASSERT_EQUALS("[test.cpp:6]: (error) Uninitialized variable: a\n", errout.str());
+
+        // Ticket #2226: C++0x loop
+        checkUninitVar("void f() {\n"
+                       "    container c;\n"
+                       "    for (iterator it : c) {\n"
+                       "    }\n"
+                       "}\n");
+        ASSERT_EQUALS("", errout.str());
+
     }
 
     // switch..