Fix bug introduced in recent UCP changes (writing outside starting code unit

bitmap for non-UTF caseless character U+00DF).

src/pcre2_study.c

@@ -824,7 +824,7 @@ if (caseless)
       (void)PRIV(ord2utf)(c, buff);
       SET_BIT(buff[0]);
       }
-    else SET_BIT(c);    
+    else if (c < 256) SET_BIT(c);    
 #else  /* 16-bit or 32-bit mode */
     if (c > 0xff) SET_BIT(0xff); else SET_BIT(c);
 #endif

testdata/testinput5

@@ -2179,4 +2179,6 @@
 
 /\p{Any}*xyz/I
 
+/(|ß)7/caseless,ucp
+
 # End of testinput5

testdata/testoutput5

@@ -4938,4 +4938,6 @@ Overall options: anchored
 Last code unit = 'z'
 Subject length lower bound = 3
 
+/(|ß)7/caseless,ucp
+
 # End of testinput5