Fix compilation error for STATS=memdbg. Fix incorrect comment

Author: jan.nijtmans

generic/tclInt.h

@@ -4906,7 +4906,7 @@ MODULE_SCOPE Tcl_LibraryInitProc Procbodytest_SafeInit;
 	if (uw_ > WIDE_MAX) {			\
 	    mp_int bignumValue_;		\
 	    if (mp_init_u64(&bignumValue_, uw_) == MP_OKAY) {	\
-		(objPtr) = Tcl_NewBignumObj(&bignumValue_));	\
+		(objPtr) = Tcl_NewBignumObj(&bignumValue_);	\
 	    } else {	\
 		(objPtr) = NULL; \
 	    } \

generic/tclLink.c

@@ -557,9 +557,9 @@ GetUWide(
 	    while (numBytes-- > 0) {
 		value = (value << CHAR_BIT) | *bytes++;
 	    }
-#else /* !WORDS_BIGENDIAN */
+#else /* WORDS_BIGENDIAN */
 	    /*
-	     * Little-endian can read the value directly.
+	     * Big-endian can read the value directly.
 	     */
 	    value = scratch.value;
 #endif /* WORDS_BIGENDIAN */