X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;ds=sidebyside;f=saveresume.c;h=8bd4418f9e51ac8e2ca0f2ef41b4b4b7cf4e5f00;hb=076bb8908bf76e25e9178c178321a7f690b002d8;hp=f1d52d458423cedd5e01e7bff1dcfc4c45288eff;hpb=4e4c2e01989980a29d6bd8856c163c599d9c63d7;p=open-adventure.git

diff --git a/saveresume.c b/saveresume.c
index f1d52d4..8bd4418 100644
--- a/saveresume.c
+++ b/saveresume.c
@@ -145,6 +145,11 @@ bool is_valid(struct game_t* valgame)
         valgame->lcg_x %= LCG_M;
     }
 
+    /* Check for RNG underflow. Transpose */
+    if (valgame->lcg_x < LCG_M) {
+        valgame->lcg_x = LCG_M + (valgame->lcg_x % LCG_M);
+    }
+
     /*  Bounds check for locations */
     if ( valgame->chloc  < -1 || valgame->chloc  > NLOCATIONS ||
          valgame->chloc2 < -1 || valgame->chloc2 > NLOCATIONS ||