log: avoid incrementing 'count' for discarded log lines

This matches the behaviour of code which calls LOG_DEBUG_IO etc. instead.

Change-Id: I7679f0fc67222f947a4d0f1d53aa627a186ebcd3
Signed-off-by: R. Diez <rdiez-2006@rd10.de>
Reviewed-on: https://review.openocd.org/c/openocd/+/9318
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>

src/helper/log.c

@@ -153,10 +153,11 @@ void log_printf(enum log_levels level,
 	char *string;
 	va_list ap;
 
-	count++;
 	if (level > debug_level)
 		return;
 
+	count++;
+
 	va_start(ap, format);
 
 	string = alloc_vprintf(format, ap);
@@ -173,11 +174,11 @@ void log_vprintf_lf(enum log_levels level, const char *file, unsigned int line,
 {
 	char *tmp;
 
-	count++;
-
 	if (level > debug_level)
 		return;
 
+	count++;
+
 	tmp = alloc_vprintf(format, args);
 
 	if (!tmp)