Fixed #4404 (Forward declared class cause false style warning about missing constructor)

lib/symboldatabase.cpp

@@ -1912,9 +1912,15 @@ void Scope::getVariableList()
 
     if (classStart)
         start = classStart->next();
-    else
+
+    // global scope
+    else if (className.empty())
         start = check->_tokenizer->tokens();
 
+    // forward declaration
+    else
+        return;
+
     for (const Token *tok = start; tok; tok = tok->next()) {
         // end of scope?
         if (tok->str() == "}") {

test/testclass.cpp

@@ -52,6 +52,7 @@ private:
         TEST_CASE(noConstructor5);
         TEST_CASE(noConstructor6); // ticket #4386
         TEST_CASE(noConstructor7); // ticket #4391
+        TEST_CASE(noConstructor8); // ticket #4404
 
         TEST_CASE(operatorEq1);
         TEST_CASE(operatorEq2);
@@ -1904,6 +1905,14 @@ private:
         ASSERT_EQUALS("", errout.str());
     }
 
+    void noConstructor8() {
+        // ticket #4404
+        checkNoConstructor("class LineSegment;\n"
+                           "class PointArray  { };\n"
+                           "void* tech_ = NULL;\n");
+        ASSERT_EQUALS("", errout.str());
+    }
+
     void checkNoMemset(const char code[]) {
         // Clear the error log
         errout.str("");