remove BL_BACKUP if it wasnt created

Author: nift4

app/src/main/java/org/andbootmgr/app/DeviceInfo.kt

@@ -21,6 +21,12 @@ interface DeviceInfo {
 	val codename: String
 	val blBlock: String
 	val metaonsd: Boolean
+	/* Environment variables:
+	 * - BOOTED=true SETUP=false BL_BACKUP=<unset> for droidboot update
+	 * - BOOTED=false SETUP=false BL_BACKUP=<path> for droidboot fix
+	 * - BOOTED=false SETUP=true BL_BACKUP=<path> for droidboot install + sd creation
+	 * - BOOTED=true SETUP=true BL_BACKUP=<unset> for sd creation with already installed droidboot
+	 */
 	val postInstallScript: Boolean
 	val havedtbo: Boolean
 	fun isInstalled(logic: DeviceLogic): Boolean

app/src/main/java/org/andbootmgr/app/DroidBootFlow.kt

@@ -354,7 +354,8 @@ private fun Flash(d: DroidBootFlowDataHolder) {
 			terminal.add(vm.activity.getString(R.string.term_device_setup))
 			vm.logic.runShFileWithArgs(
 				"BOOTED=${vm.deviceInfo.isBooted(vm.logic)} SETUP=true " +
-						"BL_BACKUP=${vm.logic.lkBackupPrimary.absolutePath} " +
+						(if (vm.deviceInfo.isBooted(vm.logic)) "" else
+						"BL_BACKUP=${vm.logic.lkBackupPrimary.absolutePath} ") +
 						"${tmpFile!!.absolutePath} real"
 			).to(terminal).exec()
 			tmpFile.delete()