Added test case for false positive, fails currently

testmemleak.cpp

@@ -1044,6 +1044,15 @@ private:
                "    free(a - 10);\n"
                "}\n" );
 
+        ASSERT_EQUALS( std::string(""), errout.str() );
+
+        check( "void foo()\n"
+               "{\n"
+               "    char *a = (char *)malloc(10);\n"
+               "    a = a + 10;\n"
+               "    free(a - 10);\n"
+               "}\n" );
+
         ASSERT_EQUALS( std::string(""), errout.str() );
     }