fix some pathops bugs found in 1M skps

src/pathops/SkIntersections.h

Index: src/pathops/SkIntersections.h
diff --git a/src/pathops/SkIntersections.h b/src/pathops/SkIntersections.h
index ac9276beec2299df7ce9c800af76fde92d640099..b733ed0ea7f654847fbe6b3629c02af886d36858 100644
--- a/src/pathops/SkIntersections.h
+++ b/src/pathops/SkIntersections.h
@@ -25,6 +25,9 @@ public:
         sk_bzero(fPt2, sizeof(fPt2));
         sk_bzero(fT, sizeof(fT));
         sk_bzero(fNearlySame, sizeof(fNearlySame));
+#if DEBUG_T_SECT_LOOP_COUNT
+        sk_bzero(fDebugLoopCount, sizeof(fDebugLoopCount));
+#endif
         reset();
         fMax = 0;  // require that the caller set the max
     }
@@ -277,7 +280,16 @@ public:
 #endif
     }
 
+    enum DebugLoop {
+        kIterations_DebugLoop,
+        kCoinCheck_DebugLoop,
+        kComputePerp_DebugLoop,
+    };
+
+    void debugBumpLoopCount(DebugLoop );
     int debugCoincidentUsed() const;
+    int debugLoopCount(DebugLoop ) const;
+    void debugResetLoopCount();
     void dump() const;  // implemented for testing only
 
 private:
@@ -299,6 +311,9 @@ private:
 #ifdef SK_DEBUG
     int fDepth;
 #endif
+#if DEBUG_T_SECT_LOOP_COUNT
+    int fDebugLoopCount[3];
+#endif
 };
 
 #endif