Coding Standards: Remove redundant checks in wp_resolve_numeric_slug_conflicts().

This commit removes two unnecessary conditional checks:
* A truthy check for `$compare`, as a falsey value causes an earlier return a few lines above.
* A check to ensure `$maybe_page` is not an empty string, as it is already cast to an integer.

Follow-up to [32648], [34492], [53857].

Props justlevine.
See #63268.

git-svn-id: https://develop.svn.wordpress.org/trunk@60447 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

src/wp-includes/rewrite.php

@@ -412,7 +412,7 @@ function wp_resolve_numeric_slug_conflicts( $query_vars = array() ) {
 
 	// This is the potentially clashing slug.
 	$value = '';
-	if ( $compare && array_key_exists( $compare, $query_vars ) ) {
+	if ( array_key_exists( $compare, $query_vars ) ) {
 		$value = $query_vars[ $compare ];
 	}
 
@@ -460,9 +460,7 @@ function wp_resolve_numeric_slug_conflicts( $query_vars = array() ) {
 	}
 
 	// If we've gotten to this point, we have a slug/date clash. First, adjust for nextpage.
-	if ( '' !== $maybe_page ) {
-		$query_vars['page'] = (int) $maybe_page;
-	}
+	$query_vars['page'] = $maybe_page;
 
 	// Next, unset autodetected date-related query vars.
 	unset( $query_vars['year'] );