font.c: set null dimensions on null str

1 files changed, 11 insertions, 0 deletions

diff --git a/src/font/src/font.c b/src/font/src/font.c
index 1e1bb6c..ab6865a 100644
--- a/src/font/src/font.c
+++ b/src/font/src/font.c
@@ -9,6 +9,17 @@ static int renderstr(const enum font f, const short x, short y,
     const char *str, const bool render, short *const max_x,
     short *const max_y)
 {
+    if (!str)
+    {
+        if (max_x)
+            *max_x = 0;
+
+        if (max_y)
+            *max_y = 0;
+
+        return 0;
+    }
+
     static const struct cfg
     {
         const struct sprite *s;