Use 'ptrdiff_t' instead of 'int' for pointer offset parameters

A number of the load/store functions in mem_neon.h use type 'int' for
the 'stride' pointer offset parameter. This causes Clang to generate
the following warning every time these functions are called with a
wider type passed in for 'stride':

warning: implicit conversion loses integer precision: 'ptrdiff_t'
(aka 'long') to 'int' [-Wshorten-64-to-32]

This patch changes all such instances of 'int' to 'ptrdiff_t'.

Bug: b/181236880
Change-Id: I2e86b005219e1fbb54f7cf2465e918b7c077f7ee
1 file changed