Clean up some lint complaints and fix center_of_mass()

src/gpu/batches/GrAAConvexTessellator.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrAAConvexTessellator.h"
 #include "SkCanvas.h"
 #include "SkPath.h"
@@ skipping 703 matching lines @@
 
         nextRing->addIdx(newIdx, fCandidateVerts.origEdge(i));
     }
 
     // 'dst' currently has indices into the ring. Remap these to be indices
     // into the global pool since the triangulation operates in that space.
     for (int i = 0; i < dst.count(); ++i) {
         dst[i] = nextRing->index(dst[i]);
     }
 
-    for (int cur = 0; cur < lastRing.numPts(); ++cur) {
-        int next = (cur + 1) % lastRing.numPts();
+    for (int i = 0; i < lastRing.numPts(); ++i) {
+        int next = (i + 1) % lastRing.numPts();
 
-        this->addTri(lastRing.index(cur), lastRing.index(next), dst[next]);
-        this->addTri(lastRing.index(cur), dst[next], dst[cur]);
+        this->addTri(lastRing.index(i), lastRing.index(next), dst[next]);
+        this->addTri(lastRing.index(i), dst[next], dst[i]);
     }
 
     if (done && fStrokeWidth < 0.0f) {
         // fill
         this->fanRing(*nextRing);
     }
 
     if (nextRing->numPts() < 3) {
         done = true;
     }
@@ skipping 279 matching lines @@
         SkString num;
         num.printf("%d", i);
         canvas->drawText(num.c_str(), num.size(), 
                          this->point(i).fX, this->point(i).fY+(kPointRadius/2.0f), 
                          paint);
     }
 }
 
 #endif