Quiet a -Wcomma warning.

src/gpu/vk/GrVkPipelineState.cpp

Index: src/gpu/vk/GrVkPipelineState.cpp
diff --git a/src/gpu/vk/GrVkPipelineState.cpp b/src/gpu/vk/GrVkPipelineState.cpp
index 48724c07bafde7e9625d13d78fb7ecaef27a40df..71ce831d65e31146fc64993af361180aeebb5a0a 100644
--- a/src/gpu/vk/GrVkPipelineState.cpp
+++ b/src/gpu/vk/GrVkPipelineState.cpp
@@ -206,7 +206,8 @@ void GrVkPipelineState::setData(GrVkGpu* gpu,
     while (fp && glslFP) {
         glslFP->setData(fDataManager, *fp);
         append_texture_bindings(*fp, &textureBindings);
-        fp = iter.next(), glslFP = glslIter.next();
+        fp = iter.next();
+        glslFP = glslIter.next();
     }
     SkASSERT(!fp && !glslFP);