debug_stream: text_msg: exception: Skip useless " ** " prefix

Skip useless " ** " prefix from exception dumps to save byte is in the
debug_stream buffer.

Signed-off-by: Jyri Sarha <jyri.sarha@linux.intel.com>

Author: Jyri Sarha

src/debug/debug_stream/debug_stream_text_msg.c

@@ -103,6 +103,11 @@ static void ds_exception_dump(const char *format, va_list args)
 	if (format[0] == '\0')
 		return;
 
+	/* Skip useless " ** " prefix to save bytes */
+	if (strlen(format) >= 4 &&
+	    format[0] == ' ' && format[1] == '*' && format[2] == '*' && format[3] == ' ')
+		format += 4;
+
 	len = vsnprintf(ds_buf[cpu].text + ds_pos[cpu], avail, format, args);
 	if (len < 0) {
 		ds_pos[cpu] = 0;