Fixed issue #1877 (rounding introduces DRC error in LEF/DEF via)

testdata/lefdef/issue-1877/tech.lef

@@ -0,0 +1,27 @@
+VERSION 5.6 ;
+BUSBITCHARS "[]" ;
+DIVIDERCHAR "/" ;
+ 
+UNITS
+  DATABASE MICRONS 1000 ;
+END UNITS
+MANUFACTURINGGRID 0.001 ;
+ 
+LAYER METAL_1
+  TYPE ROUTING ;
+  DIRECTION HORIZONTAL ;
+    WIDTH 0.6 ;
+END METAL_1
+
+LAYER VIA_1
+  TYPE CUT ;
+END VIA_1
+
+LAYER METAL_2
+  TYPE ROUTING ;
+  DIRECTION VERTICAL ;
+    WIDTH 0.6 ;
+END METAL_2 
+
+END LIBRARY
+

testdata/lefdef/issue-1877/tech.map

@@ -0,0 +1,4 @@
+DIEAREA ALL 1 0
+METAL_1 ALL 2 0
+VIA_1 ALL 3 0
+METAL_2 ALL 4 0

testdata/lefdef/issue-1877/test.def

@@ -0,0 +1,21 @@
+VERSION 5.8 ;
+DIVIDERCHAR "/" ;
+BUSBITCHARS "[]" ;
+DESIGN dummy_design ;
+UNITS DISTANCE MICRONS 1000 ;
+
+DIEAREA ( 21500 7000 ) ( 26000 9000 ) ;
+
+VIAS 1 ;
+    - via1_2_XXXX_XXX_X_X_XXX_XXX + VIARULE MYVIA1_ARRAY + CUTSIZE 246 246  + LAYERS METAL_1 VIA_1 METAL_2  + CUTSPACING 231 231  + ENCLOSURE 62 137 8 61  + ROWCOL 1 8  ;
+END VIAS
+ 
+ 
+SPECIALNETS 1 ;
+    - VDD 
+# ( PIN VDD ) ( * vdd ) 
+      + USE POWER
+      + ROUTED METAL_1 0 + SHAPE STRIPE ( 23620 7840 ) via1_2_XXXX_XXX_X_X_XXX_XXX ;
+END SPECIALNETS
+ 
+END DESIGN