Fix min/max typo in BoxConstraints.deflate

sky/tests/raw/padding_deflate-expected.txt

Index: sky/tests/raw/padding_deflate-expected.txt
diff --git a/sky/tests/raw/render_box-expected.txt b/sky/tests/raw/padding_deflate-expected.txt
similarity index 80%
copy from sky/tests/raw/render_box-expected.txt
copy to sky/tests/raw/padding_deflate-expected.txt
index 63daffb92e380655f85ed3b647b6020eab740eb9..ac2eb9d4b17375d549f7c10da3d8a3281a3f4830 100644
--- a/sky/tests/raw/render_box-expected.txt
+++ b/sky/tests/raw/padding_deflate-expected.txt
@@ -5,9 +5,8 @@ PAINT FOR FRAME #1 ----------------------------------------------
 1 | TestDisplayList() constructor: 800.0 x 600.0
 1 | paintChild at 0.0,0.0
 1 |  | TestDisplayList() constructor: 800.0 x 600.0
-1 |  | drawRect(0.0:0.0:600.0:800.0, Paint(0xff00ff00))

[Hixie, 2015/06/03 18:11:02]

I would leave the colour in the test, to check that it paints in the right
place. but whatever.

 ------------------------------------------------------------------------
-CONSOLE: PASS: should size to render view
+CONSOLE: PASS: should not have a 0 sized colored Box
 CONSOLE: 
 CONSOLE: All 1 tests passed.
 CONSOLE: unittest-suite-success