pcopy: Fix some swizzle-related definitions.
pcopy: Fix some swizzle-related definitions.

grate-driver/envytools,pierremoreau/envytools,pierremoreau/envytools,pierremoreau/envytools,karolherbst/envytools,MoochMcGee/envytools,kfractal/envytools,envytools/envytools,MoochMcGee/envytools,hakzsam/envytools,karolherbst/envytools,MoochMcGee/envytools,kfractal/envytools,envytools/envytools,kfractal/envytools,envytools/envytools,grate-driver/envytools,grate-driver/envytools,hakzsam/envytools,MoochMcGee/envytools,grate-driver/envytools,MoochMcGee/envytools,grate-driver/envytools,hakzsam/envytools,envytools/envytools,hakzsam/envytools,hakzsam/envytools,karolherbst/envytools,pierremoreau/envytools,envytools/envytools,karolherbst/envytools,karolherbst/envytools,pierremoreau/envytools,kfractal/envytools,kfractal/envytools