Fix gcc9 warning around size of memset.

GCC version 9 added a diagnostic about

‘memset’ used with length equal to number of elements without multiplication by element size [-Werror=memset-elt-size]

In SkSLInterpreter.h, make it obvious to both the compiler and reader of
the code that the intention is to memset the first element of the array.

Change-Id: I9531eb220a39d3fc31e9faad3649f39204e74dc1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/279861
Commit-Queue: Ben Wagner <bungeman@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
1 file changed