Crash in [JSCoreTextView drawInContext:bounds:]

[radhap]

Crash at https://github.com/jasarien/CoreTextHyperlinkView/blob/master/Classes/JSCoreTextView.m#L653 I think this line of code const CGPoint *positions = CTRunGetPositionsPtr(run); is returning NULL, and so is the crash..

Please let me know if this fix looks ok.

•                CGPoint *positionsBuffer;
  

•                BOOL shouldFreePositions = NO;
  

•                if (positions == NULL) // Ptr gave NULL, we'll need to copy positions array and later free it
  

•                {
  

•                    CFIndex glyphCount = CTRunGetGlyphCount(run);
  

•                    size_t positionsBufferSize = sizeof(CGPoint) \* glyphCount;
  

•                    positionsBuffer = malloc(positionsBufferSize);
  

•                    shouldFreePositions = YES;
  

•                    CTRunGetPositions(run, CFRangeMake(0, 0), positionsBuffer);
  

•                    positions = positionsBuffer;
  

•                }
  

And later free it as

•                if (shouldFreePositions)
  

•                {
  

•                    free(positionsBuffer);
  

•                }