Fix metadata generation for null string constants (#5690)

This should take the code path that returns `ConstantReferenceValue`.

1 files changed, 4 insertions, 4 deletions

diff --git a/src/ILCompiler.MetadataTransform/src/ILCompiler/Metadata/Transform.CustomAttribute.cs b/src/ILCompiler.MetadataTransform/src/ILCompiler/Metadata/Transform.CustomAttribute.cs
index ecf9532e7..31f61c5e8 100644
--- a/src/ILCompiler.MetadataTransform/src/ILCompiler/Metadata/Transform.CustomAttribute.cs
+++ b/src/ILCompiler.MetadataTransform/src/ILCompiler/Metadata/Transform.CustomAttribute.cs
@@ -117,14 +117,14 @@ namespace ILCompiler.Metadata
                     return new ConstantUInt64Value { Value = (ulong)value };
             }
 
-            if (type.IsString)
+            if (value == null)
             {
-                return HandleString((string)value);
+                return new ConstantReferenceValue();
             }
 
-            if (value == null)
+            if (type.IsString)
             {
-                return new ConstantReferenceValue();
+                return HandleString((string)value);
             }
 
             if (type.IsSzArray)