Fixed crash on range-based for-loop

lib/checkstl.cpp

@@ -313,6 +313,9 @@ void CheckStl::stlOutOfBounds()
             tok = tok->linkAt(1)->tokAt(2);
         } else
             tok = tok->next();
+
+        if (!tok)
+            continue;
         tok = tok->next();
 
         // check if the for loop condition is wrong

test/teststl.cpp

@@ -577,6 +577,11 @@ private:
               "    foo[ii] = 0;\n"
               "}");
         ASSERT_EQUALS("", errout.str());
+
+        check("void foo() {\n"
+              "    for (B b : D()) {}\n" // Don't crash on range-based for-loop
+              "}");
+        ASSERT_EQUALS("", errout.str());
     }
 
     void STLSizeNoErr() {