Addressed more Windows compiler complaint issues

http://codereview.appspot.com/6007056/



git-svn-id: http://skia.googlecode.com/svn/trunk@3689 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/tablecolorfilter.cpp b/gm/tablecolorfilter.cpp
index 7f0a623..6e2b943 100644
--- a/gm/tablecolorfilter.cpp
+++ b/gm/tablecolorfilter.cpp
@@ -66,7 +66,7 @@
 static void make_table2(uint8_t table[]) {
     for (int i = 0; i < 256; ++i) {
         float fi = i / 255.0f;
-        table[i] = sqrtf(fi) * 255;
+        table[i] = static_cast<uint8_t>(sqrtf(fi) * 255);
     }
 }