twrp.cpp: Add braces for fastboot mode

Without brace, only the line until ";" is guarded

Change-Id: I5483840ddcc2731cffa8552ca69730a1a3a47a69
diff --git a/twrp.cpp b/twrp.cpp
index 39de60e..c4b1b40 100644
--- a/twrp.cpp
+++ b/twrp.cpp
@@ -393,10 +393,11 @@
 	}
 
 #ifdef TW_LOAD_VENDOR_MODULES
-	if (startup.Get_Fastboot_Mode())
-	android::base::SetProperty("ro.boot.fastboot", "1");
+	if (startup.Get_Fastboot_Mode()) {
+		android::base::SetProperty("ro.boot.fastboot", "1");
 		PartitionManager.Prepare_Super_Volume(PartitionManager.Find_Partition_By_Path("/vendor"));
 		PartitionManager.Prepare_Super_Volume(PartitionManager.Find_Partition_By_Path("/vendor_dlkm"));
+	}
 	KernelModuleLoader::Load_Vendor_Modules();
 #endif