ELF: Fix crash when LoadOptions is null

Il2CppInspector.Common/FileFormatStreams/ElfReader.cs

@@ -209,7 +209,7 @@ namespace Il2CppInspector
 
             // Rebase if requested (whether dumped or not) and treat it as a memory image,
             // disabling processing of relocations, symbols and decryption
-            if (LoadOptions?.ImageBase != 0) {
+            if (LoadOptions != null && LoadOptions.ImageBase != 0) {
                 isMemoryImage = true;
                 rebase(conv.FromULong(LoadOptions.ImageBase));
             }