Add $(CONFIG_H) as a build-dependency for sparse

Signed-off-by: Andreas Ericsson <ae@op5.se>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

Makefile

@@ -41,7 +41,7 @@ apidocs:
 
 test: $(TEST_RUN)
 
-sparse:
+sparse: $(CONFIG_H)
 	@for i in $(SRC_C); do sparse $$i -DSPARSE_IS_RUNNING $(SPARSE_FLAGS) $(BASIC_CFLAGS) $(CFLAGS); done
 
 install-headers: $(PUBLIC_HEADERS)