Izchak occasionally stocks wands/scrolls/spellbooks of light

This comes from xNetHack by copperwater <aosdict@gmail.com>

doc/fixes37.0

@@ -618,6 +618,7 @@ similar "The ogre lord yanks Cleaver from your corpses!" due to caching the
 	obuf used for each item so that the same one will be reused for the
 	next item, to avoid churning through the whole pool of obufs
 gas clouds are a little random in how they spread out from a point
+Izchak occasionally stocks wands/scrolls/spellbooks of light
 
 
 Fixes to 3.7.0-x Problems that Were Exposed Via git Repository

include/mkroom.h

@@ -35,7 +35,7 @@ struct shclass {
     struct itp {
         int iprob;    /* probability of an item type */
         int itype;    /* item type: if >=0 a class, if < 0 a specific item */
-    } iprobs[6];
+    } iprobs[9];
     const char *const *shknms; /* list of shopkeeper names for this type */
 };
 

src/shknam.c

@@ -330,11 +330,14 @@ const struct shclass shtypes[] = {
       0,
       D_SHOP,
       { { 30, -WAX_CANDLE },
-        { 48, -TALLOW_CANDLE },
+        { 44, -TALLOW_CANDLE },
         { 5, -BRASS_LANTERN },
         { 9, -OIL_LAMP },
         { 3, -MAGIC_LAMP },
-        { 5, -POT_OIL } },
+        { 5, -POT_OIL },
+        { 2, -WAN_LIGHT },
+        { 1, -SCR_LIGHT },
+        { 1, -SPE_LIGHT } },
       shklight },
     /* sentinel */
     { (char *) 0,