system/vold: cleanup compiler warnings (read of uninitialized memory).

system/vold/ScryptParameters.cpp:48:26: warning: Assigned value is
garbage or undefined
system/vold/ScryptParameters.cpp:48:43: warning: Assigned value is
garbage or undefined
system/vold/ScryptParameters.cpp:48:9: warning: Assigned value is
garbage or undefined

Bug: 26936282
Test: WITH_TIDY=1 WITH_STATIC_ANALYZER=1 mm
Change-Id: I82ffffee48ee94ca5c7f3bbc64059f9cec109a92
diff --git a/ScryptParameters.cpp b/ScryptParameters.cpp
index 669809b..c0e2030 100644
--- a/ScryptParameters.cpp
+++ b/ScryptParameters.cpp
@@ -20,7 +20,7 @@
 #include <string.h>
 
 bool parse_scrypt_parameters(const char* paramstr, int *Nf, int *rf, int *pf) {
-    int params[3];
+    int params[3] = {};
     char *token;
     char *saveptr;
     int i;