Fix typo in eq-hashtable-ref-cell signature (#1027)

Author: agspathis

release_notes/release_notes.stex

@@ -3005,6 +3005,9 @@ The compiler avoids transforming an expression like \scheme{(+ -inf.0 x)}, where
 \scheme{x} is known to be real, into \scheme{(fl+ -inf.0 (real->flonum x))}
 in case \scheme{x} is a bignum that would be converted into \scheme{+inf.0}.
 
+A bug that incorrectly determined the return type of \scheme{eq-hashtable-ref-cell}
+to be non-false has been fixed.
+
 \subsection{Fix 32-bit ARM floating-point dereference offset (10.4.0)}
 
 A bug that affects compilation on 32-bit ARM systems has been fixed. The bug was triggered

s/primdata.ss

@@ -1326,7 +1326,7 @@
   (eq-hashtable-delete! [sig [(eq-hashtable ptr) -> (void)]] [flags true])
   (eq-hashtable-ephemeron? [sig [(eq-hashtable) -> (boolean)]] [flags pure mifoldable discard])
   (eq-hashtable-ref [sig [(eq-hashtable ptr ptr) -> (ptr)]] [flags discard])
-  (eq-hashtable-ref-cell [sig [(eq-hashtable ptr) -> (prt)]] [flags discard])
+  (eq-hashtable-ref-cell [sig [(eq-hashtable ptr) -> (ptr)]] [flags discard])
   (eq-hashtable-set! [sig [(eq-hashtable ptr ptr) -> (void)]] [flags true])
   (eq-hashtable-try-atomic-cell [sig [(eq-hashtable ptr ptr) -> (maybe-pair)]] [flags])
   (eq-hashtable-update! [sig [(eq-hashtable ptr procedure ptr) -> (void)]] [flags])