Use strtoll() for hex literals to handle 64-bit ones even on 32-bit.

example/syntax.wren

@@ -130,9 +130,8 @@ class Literals is SyntaxExample {
     1.0
     -12.34
     0x1000000
-// Literals larger than 0x1000000 are only valid in 64 bit builds
-//    0xdeadbeef
-//    0x1234567890ABCDEF
+    0xdeadbeef
+    0x1234567890ABCDEF
   }
 
   strings {

src/vm/wren_compiler.c

@@ -712,16 +712,23 @@ static void makeNumber(Parser* parser, bool isHex)
 {
   errno = 0;
 
-  // We don't check that the entire token is consumed because we've already
-  // scanned it ourselves and know it's valid.
-  parser->current.value = NUM_VAL(isHex ? strtol(parser->tokenStart, NULL, 16)
-                                        : strtod(parser->tokenStart, NULL));
+  if (isHex)
+  {
+    parser->current.value = NUM_VAL(strtoll(parser->tokenStart, NULL, 16));
+  }
+  else
+  {
+    parser->current.value = NUM_VAL(strtod(parser->tokenStart, NULL));
+  }
   
   if (errno == ERANGE)
   {
-    lexError(parser, "Number literal was too large.");
+    lexError(parser, "Number literal was too large (%d).", sizeof(long int));
     parser->current.value = NUM_VAL(0);
   }
+  
+  // We don't check that the entire token is consumed after calling strtoll()
+  // or strtod() because we've already scanned it ourselves and know it's valid.
 
   makeToken(parser, TOKEN_NUMBER);
 }

test/language/number/hex_literals.wren

@@ -5,4 +5,5 @@ System.print(x + 1) // expect: 256
 System.print(x == 255) // expect: true
 System.print(0x09 is Num) // expect: true
 System.print(x is Num) // expect: true
-System.print(-0xFF) // expect: -255
+System.print(-0xFF) // expect: -255
+System.print(0xdeadbeef) // expect: 3735928559