[Backport generator] Fix uninitialized member

(cherry picked from commit MeVisLab/pythonqt@e06ac98)

Author: usiems

generator/typesystem.h

@@ -681,7 +681,8 @@ class EnumTypeEntry : public TypeEntry
         : TypeEntry(nspace.isEmpty() ? enumName : nspace + QLatin1String("::") + enumName,
                     EnumType),
           m_flags(0),
-          m_extensible(false)
+          m_extensible(false),
+          m_force_integer(false)
     {
         m_qualifier = nspace;
         m_java_name = enumName;