Increment text pointer when the width is zero in the subpixel with center and right alignment.

src/core/SkFindAndPlaceGlyph.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkFindAndPositionGlyph_DEFINED
 #define SkFindAndPositionGlyph_DEFINED
 
@@ skipping 290 matching lines @@
         void findAndPositionGlyph(const char** text, SkPoint position,
                                   ProcessOneGlyph&& processOneGlyph) override {
             SkPoint finalPosition = position;
             if (kTextAlignment != SkPaint::kLeft_Align) {
                 // Get the width of an un-sub-pixel positioned glyph for calculating the alignment.
                 // This is not needed for kLeftAlign because its adjustment is always {0, 0}.
                 const char* tempText = *text;
                 const SkGlyph &metricGlyph = fGlyphCacheProc(fCache, &tempText, 0, 0);
 
                 if (metricGlyph.fWidth <= 0) {
+                    // Exiting early, be sure to update text pointer.
+                    *text = tempText;
                     return;
                 }
 
                 // Adjust the final position by the alignment adjustment.
                 finalPosition -= TextAlignmentAdjustment(kTextAlignment, metricGlyph);
             }
 
             // Find the glyph.
             SkIPoint lookupPosition = SubpixelAlignment(kAxisAlignment, finalPosition);
             const SkGlyph& renderGlyph = fGlyphCacheProc(
@@ skipping 193 matching lines @@
             positioner.Positioner::findAndPositionGlyph(
                 &cursor, mappedPoint, skstd::forward<ProcessOneGlyph>(processOneGlyph));
         }
         return true;
     }
     return false;
 }
 
 
 #endif  // SkFindAndPositionGlyph_DEFINED