harden pathops for pathological test

src/pathops/SkPathOpsTypes.h

Index: src/pathops/SkPathOpsTypes.h
diff --git a/src/pathops/SkPathOpsTypes.h b/src/pathops/SkPathOpsTypes.h
index 96627842b3701a186792716bae400b6cfca0a639..01fec0d0b616a7d324dd2e1cd9d0e72cca9d204c 100644
--- a/src/pathops/SkPathOpsTypes.h
+++ b/src/pathops/SkPathOpsTypes.h
@@ -141,6 +141,12 @@ inline bool roughly_zero(double x) {
     return fabs(x) < ROUGH_EPSILON;
 }
 
+#if 0  // unused for now
+inline bool way_roughly_zero(double x) {
+    return fabs(x) < WAY_ROUGH_EPSILON;
+}
+#endif
+
 inline bool approximately_zero_inverse(double x) {
     return fabs(x) > FLT_EPSILON_INVERSE;
 }