clover: Add constructor for clover::module.
Fix defect reported by Coverity Scan after commit 95527fe2 ("clover/module: add a printf support to module (v5)").
Uninitialized scalar variable (UNINIT) uninit_use_in_call: Using uninitialized value m.printf_strings_in_buffer when calling module.
Signed-off-by: Vinson Lee vlee@freedesktop.org
cc: @airlied @currojerez