The plain Makefile was using -Wall, but the gyp build wasn't.  This CL turns on
-Wall -Wextra and -Wno-unused in common.gypi.  This revealed a lot of warnings
(and some actual bugs), all of which I fixed here.  This is pretty mindless
stuff for the most part (order of intialization, missing initializers, && within
||, etc), but will allow us to build cleanly with -Wall and -Wextra (and
-Werror, if we so choose).

I put defaults into switches that were missing cases.  I could put in the actual
missing enums instead if that's desired.  I could also assert on missing enums
instead of break, if that's desired.  I wasn't sure how to test the stuff in
"animator", so that should be looked at a bit more closely.

Review URL:  http://codereview.appspot.com/4547055/



git-svn-id: http://skia.googlecode.com/svn/trunk@1386 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleDrawLooper.cpp b/samplecode/SampleDrawLooper.cpp
index abe2c70..30879f7 100644
--- a/samplecode/SampleDrawLooper.cpp
+++ b/samplecode/SampleDrawLooper.cpp
@@ -35,7 +35,7 @@
         info.fPaintBits = SkLayerDrawLooper::kStyle_Bit | SkLayerDrawLooper::kMaskFilter_Bit;
         info.fColorMode = SkXfermode::kSrc_Mode;
         
-        for (int i = 0; i < SK_ARRAY_COUNT(gParams); i++) {
+        for (size_t i = 0; i < SK_ARRAY_COUNT(gParams); i++) {
             info.fOffset.set(gParams[i].fOffset, gParams[i].fOffset);
             SkPaint* paint = fLooper->addLayer(info);
             paint->setAntiAlias(true);