glsl: Fix missing-braces warning.
glsl: Fix missing-braces warning.

  CXX    glsl/ast_to_hir.lo
glsl/ast_to_hir.cpp: In member function 'virtual ir_rvalue* ast_declarator_list::hir(exec_list*, _mesa_glsl_parse_state*)':
glsl/ast_to_hir.cpp:4846:42: warning: missing braces around initializer for 'unsigned int [16]' [-Wmissing-braces]

Signed-off-by: Vinson Lee <25a259f709b0f1b620605d2518271a846d8826e5@freedesktop.org>
Reviewed-by: Andres Gomez <1948e91ee7852f22bc880d172a32ffca98fb60fa@igalia.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler