Don't add artifical 1 pixel width to empty tables

LayoutTests/platform/linux/fast/css/acid2-pixel-expected.txt

Index: LayoutTests/platform/linux/fast/css/acid2-pixel-expected.txt
diff --git a/LayoutTests/platform/linux/fast/css/acid2-pixel-expected.txt b/LayoutTests/platform/linux/fast/css/acid2-pixel-expected.txt
index 9832ef64b912144bd5855ffb76ab7fdcd79be9bc..dc0e22446989acd57af02ea79bf614742b482b4a 100644
--- a/LayoutTests/platform/linux/fast/css/acid2-pixel-expected.txt
+++ b/LayoutTests/platform/linux/fast/css/acid2-pixel-expected.txt
@@ -8,9 +8,9 @@ layer at (0,0) size 800x298
           text run at (12,46) width 134: "Hello World!"
 layer at (36,72) size 764x226
   LayoutBlockFlow (relative positioned) {DIV} at (36,72) size 764x226 [border: (12px solid #00000000)]
-    LayoutTable {TABLE} at (12,12) size 1x0
-      LayoutTableSection {TBODY} at (0,0) size 1x0
-        LayoutTableRow {TR} at (0,0) size 1x0
+    LayoutTable {TABLE} at (12,12) size 0x0
+      LayoutTableSection {TBODY} at (0,0) size 0x0
+        LayoutTableRow {TR} at (0,0) size 0x0
           LayoutTableCell {TD} at (0,0) size 0x0 [r=0 c=0 rs=1 cs=1]
     LayoutBlockFlow {DIV} at (60,60) size 120x12 [bgcolor=#FF0000] [border: none (12px solid #000000) none (12px solid #000000)]
       LayoutBlockFlow {DIV} at (12,0) size 144x12