i965/vec4: handle doubles in type_size_vec4()
i965/vec4: handle doubles in type_size_vec4()

The scalar backend uses this to check URB input sizes.

v2: Removed redundant break after return (Curro)

Reviewed-by: Kenneth Graunke <bd2562f754ec92342f93f61c25d731e290a2ffa8@whitecape.org>
Reviewed-by: Francisco Jerez <5906ff32bdd9fd8db196f6ba5ad3afd6f9257ea5@riseup.net>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler