Fixed interpretation of TYPE OVERLAP, added test

testdata/lefdef/issue-1499/blocks.lef

@@ -0,0 +1,31 @@
+VERSION 5.8 ;
+
+MACRO a
+  ORIGIN 0 0 ;
+  SIZE 600 BY 600 ;
+  OBS 
+    LAYER M1 ;
+      RECT 10 10 590 590 ;
+  END
+END a
+
+MACRO b
+  ORIGIN -600 0 ;
+  SIZE 400 BY 500 ;
+  OBS 
+    LAYER M1 ;
+      RECT 610 10 990 490 ;
+  END
+END b
+
+MACRO c
+  ORIGIN -500 -500 ;
+  SIZE 500 BY 500 ;
+  OBS 
+    LAYER M1 ;
+      POLYGON 510 610 610 610 610 510 990 510 990 990 510 990 ;
+    LAYER overlap ;
+      RECT 500 700 1000 1000 ;
+      POLYGON 500 600  600 600  600 500  1000 500  1000 700  500 700 ;
+  END
+END c

testdata/lefdef/issue-1499/tech.lef

@@ -0,0 +1,12 @@
+VERSION 5.8 ;
+
+LAYER M1
+  TYPE ROUTING ;
+  DIRECTION HORIZONTAL ;
+  WIDTH 0.1 ;
+  PITCH 0.1 ;
+END M1
+
+LAYER overlap
+  TYPE OVERLAP ;
+END overlap

testdata/lefdef/issue-1499/tech.map

@@ -0,0 +1,6 @@
+DIEAREA ALL 1 0
+#BOUNDARY DIEAREA 1 0
+BOUNDARY MACRO 1 0
+#M1 LEFOBS 2 0
+M1 LEFOBS 3 0
+M1 BLOCKAGE 3 0

testdata/lefdef/issue-1499/top.def

@@ -0,0 +1,10 @@
+VERSION 5.8 ;
+DESIGN top ;
+UNITS DISTANCE MICRONS 1000 ;
+DIEAREA ( 0 0 ) ( 1000000 1000000 ) ;
+COMPONENTS 3 ;
+- a a + PLACED ( 0 0 ) N ;
+- b b + PLACED ( 600000 0 ) N ;
+- c c + PLACED ( 500000 500000 ) N ;
+END COMPONENTS
+END DESIGN