Prevent webp from producing 0 dimensional images

src/codec/SkWebpCodec.cpp

Index: src/codec/SkWebpCodec.cpp
diff --git a/src/codec/SkWebpCodec.cpp b/src/codec/SkWebpCodec.cpp
index b02015c7a7684ca10ae9ce802762c104feab954a..818c64db493a68c3e6c6b88d8af65d6503a958ae 100644
--- a/src/codec/SkWebpCodec.cpp
+++ b/src/codec/SkWebpCodec.cpp
@@ -103,8 +103,8 @@ static bool conversion_possible(const SkImageInfo& dst, const SkImageInfo& src)
 
 SkISize SkWebpCodec::onGetScaledDimensions(float desiredScale) const {
     SkISize dim = this->getInfo().dimensions();
-    dim.fWidth = SkScalarRoundToInt(desiredScale * dim.fWidth);
-    dim.fHeight = SkScalarRoundToInt(desiredScale * dim.fHeight);
+    dim.fWidth = SkTMax(1, SkScalarRoundToInt(desiredScale * dim.fWidth));

[scroggo, 2015/06/19 14:19:51]

Maybe add a comment explaining our decision (on the other hand, maybe it's
obvious).

[msarett, 2015/06/19 14:28:45]

Done.

+    dim.fHeight = SkTMax(1, SkScalarRoundToInt(desiredScale * dim.fHeight));
     return dim;
 }