PoolBuilder: Move merging of constaints to be loaded into relevant section

src/Composer/DependencyResolver/PoolBuilder.php

@@ -265,22 +265,22 @@ class PoolBuilder
             $constraint = $rootRequires[$name];
         }
 
-        // Maybe it was already marked before but not loaded yet. In that case
-        // we have to extend the constraint (we don't check if they are identical because
-        // MultiConstraint::create() will optimize anyway)
-        if (isset($this->packagesToLoad[$name])) {
-            // Already marked for loading and this does not expand the constraint to be loaded, nothing to do
-            if (Intervals::isSubsetOf($constraint, $this->packagesToLoad[$name])) {
-                return;
-            }
-
-            // extend the constraint to be loaded
-            $constraint = Intervals::compactConstraint(MultiConstraint::create(array($this->packagesToLoad[$name], $constraint), false));
-        }
-
         // Not yet loaded or already marked for a reload, override the existing constraint
         // (either it's a new one to load, or it has already been extended above)
         if (!isset($this->loadedPackages[$name])) {
+            // Maybe it was already marked before but not loaded yet. In that case
+            // we have to extend the constraint (we don't check if they are identical because
+            // MultiConstraint::create() will optimize anyway)
+            if (isset($this->packagesToLoad[$name])) {
+                // Already marked for loading and this does not expand the constraint to be loaded, nothing to do
+                if (Intervals::isSubsetOf($constraint, $this->packagesToLoad[$name])) {
+                    return;
+                }
+
+                // extend the constraint to be loaded
+                $constraint = Intervals::compactConstraint(MultiConstraint::create(array($this->packagesToLoad[$name], $constraint), false));
+            }
+
             $this->packagesToLoad[$name] = $constraint;
             return;
         }