Factor out option variables from int to bool types

Change-Id: Ia897aa43e44d115bde6de91789b35723826ace22
diff --git a/adb_install.cpp b/adb_install.cpp
index e328960..6d6dbb1 100644
--- a/adb_install.cpp
+++ b/adb_install.cpp
@@ -73,7 +73,7 @@
 #define ADB_INSTALL_TIMEOUT 300
 
 int
-apply_from_adb(RecoveryUI* ui_, int* wipe_cache, const char* install_file) {
+apply_from_adb(RecoveryUI* ui_, bool* wipe_cache, const char* install_file) {
     ui = ui_;
 
     stop_adbd();