Fixed some minor compiler warnings.

src/db/db/dbEdgePairsDelegate.cc

@@ -34,6 +34,7 @@ EdgePairsDelegate::EdgePairsDelegate ()
 }
 
 EdgePairsDelegate::EdgePairsDelegate (const EdgePairsDelegate &other)
+  : tl::UniqueId ()
 {
   operator= (other);
 }

src/db/db/dbEdgesDelegate.cc

@@ -37,6 +37,7 @@ EdgesDelegate::EdgesDelegate ()
 }
 
 EdgesDelegate::EdgesDelegate (const EdgesDelegate &other)
+  : tl::UniqueId ()
 {
   operator= (other);
 }

src/db/db/dbLayout.cc

@@ -290,6 +290,8 @@ Layout::Layout (const db::Layout &layout)
   : db::Object (layout),
     db::LayoutStateModel (),
     gsi::ObjectBase (),
+    tl::Object (),
+    tl::UniqueId (),
     m_cells_size (0),
     m_invalid (0),
     m_top_cells (0),

src/db/db/dbRegionDelegate.cc

@@ -38,6 +38,7 @@ RegionDelegate::RegionDelegate ()
 }
 
 RegionDelegate::RegionDelegate (const RegionDelegate &other)
+  : tl::UniqueId ()
 {
   operator= (other);
 }

src/tl/unit_tests/tlListTests.cc

@@ -32,7 +32,7 @@ static size_t obj_count = 0;
 struct MyClass1 : public tl::list_node<MyClass1>
 {
   MyClass1 (int _n) : n (_n) { ++obj_count; }
-  MyClass1 (const MyClass1 &other) : n (other.n) { ++obj_count; }
+  MyClass1 (const MyClass1 &other) : tl::list_node<MyClass1> (), n (other.n) { ++obj_count; }
   ~MyClass1 () { --obj_count; }
   int n;
   bool operator== (const MyClass1 &other) const { return n == other.n; }