Change LOG() macro to be varadic

This changes the LOG macro to be varadic removing the need for all
callsites to have double bracketing and allows for future improvement
on how we use the logging macros.

The callsites were changed with coccinelle and the changes checked by
hand. Compile tested for several frontends but not all.

A formatting annotation has also been added which allows the compiler
to check the parameters and types passed to the logging.

1 files changed, 2 insertions, 2 deletions

diff --git a/gtk/plotters.c b/gtk/plotters.c
index ab7e4c5fb..33f4c65fe 100644
--- a/gtk/plotters.c
+++ b/gtk/plotters.c
@@ -450,7 +450,7 @@ static bool nsgtk_plot_path(const float *p, unsigned int n, colour fill, float w
 		return true;
 
 	if (p[0] != PLOTTER_PATH_MOVE) {
-		LOG(("Path does not start with move"));
+		LOG("Path does not start with move");
 		return false;
 	}
 
@@ -489,7 +489,7 @@ static bool nsgtk_plot_path(const float *p, unsigned int n, colour fill, float w
 				       p[i+5], p[i+6]);
 			i += 7;
 		} else {
-			LOG(("bad path command %f", p[i]));
+			LOG("bad path command %f", p[i]);
 			/* Reset matrix for safety */
 			cairo_set_matrix(current_cr, &old_ctm);
 			return false;