issue #6690 Regression in handling of shorthand signed/unsigned types…

… in function parameters (with bisect and test case)

For some keywords not the value of the 'type' should decide whether the 'name' in the name field is part of the 'type' or is the 'name' in the argument.

src/defargs.l

@@ -107,12 +107,12 @@ static int yyread(char *buf,int max_size)
 static bool checkSpecialType(QCString &typ, QCString &nam)
 {
   if (nam == "unsigned" || nam == "signed" ||
+      nam == "int" || nam == "long" ||
       nam == "volatile" || nam == "const") return TRUE;
   QCStringList qsl=QCStringList::split(' ',typ);
   for (uint j=0;j<qsl.count();j++)
   {
-    if (!(qsl[j] == "unsigned" || qsl[j] == "signed" ||
-          qsl[j] == "volatile" || qsl[j] == "const")) return FALSE;
+    if (!(qsl[j] == "volatile" || qsl[j] == "const")) return FALSE;
   }
   return TRUE;
 }