Fix early termination of GM when 16x msaa rt can't be created.



git-svn-id: http://skia.googlecode.com/svn/trunk@3744 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/gmmain.cpp b/gm/gmmain.cpp
index 3855f2f..7185a73 100644
--- a/gm/gmmain.cpp
+++ b/gm/gmmain.cpp
@@ -845,7 +845,7 @@
                 desc.fSampleCnt = gRec[i].fSampleCnt;
                 GrTexture* tex = gr->createUncachedTexture(desc, NULL, 0);
                 if (!tex) {
-                    return false;
+                    continue;
                 }
                 rt.reset(tex->asRenderTarget());
                 rt.get()->ref();