build: Initialize value of $C (sparse checker enable/disable)

Otherwise we get

  Cmds:19: warning: undefined variable `C'

during `make coverity'.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 1 insertions, 0 deletions

diff --git a/Cmds b/Cmds
index 2296e76..1c9fc72 100644
--- a/Cmds
+++ b/Cmds
@@ -16,6 +16,7 @@ else
 endif
 
 # sparse related
+C =
 ifeq ($(C), 1)
   CHECK = $(Q)echo -e "  CHECK\t$<" && sparse
 else