lib: parser: guard yylloc

yylloc seems to be NULL on parser init for some flex+bison
combinations...

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>

diff --git a/lib/command_lex.l b/lib/command_lex.l
index 703596b43dbf26cc92b4f1f56371afe6699e195d..2a241abbec679966a6ae6b4652bd0a69073b0f68 100644 (file)
--- a/lib/command_lex.l
+++ b/lib/command_lex.l
@@ -26,9 +26,10 @@
 #include "command_parse.h"
 
 #define YY_USER_ACTION yylloc->last_column += yyleng;
-#define LOC_STEP \
+#define LOC_STEP do { if (yylloc) { \
         yylloc->first_column = yylloc->last_column; \
-        yylloc->first_line = yylloc->last_line;
+        yylloc->first_line = yylloc->last_line; \
+       } } while(0)
 %}
 
 WORD            (\-|\+)?[a-z0-9\*][-+_a-zA-Z0-9\*]*