Fixed #3126 (false positive: Null pointer dereference)

lib/checknullpointer.cpp

@@ -866,7 +866,7 @@ void CheckNullPointer::nullConstantDereference()
                 }
             }
 
-            else if (indentlevel > 0 && Token::Match(tok, "%var% ("))
+            else if (indentlevel > 0 && Token::Match(tok->previous(), "[={};] %var% ("))
             {
                 std::list<const Token *> var;
                 parseFunctionCall(*tok, var, 0);

test/testnullpointer.cpp

@@ -1250,6 +1250,11 @@ private:
               "}\n");
         ASSERT_EQUALS("", errout.str());
 
+        // Ticket #3126 - don't confuse member function with standard function
+        check("void f() {\n"
+              "    image1.fseek(0, SEEK_SET);\n"
+              "}");
+        ASSERT_EQUALS("", errout.str());
     }
 
     void gcc_statement_expression()