Fix error on systems where ssize_t isn't 64-bits

Fixes bug 21491366

Change-Id: If34ab89fdb410350fa5773b5495a27493a6d1211
diff --git a/fingerprintd/FingerprintDaemonProxy.cpp b/fingerprintd/FingerprintDaemonProxy.cpp
index 4f35520..a8a4024 100644
--- a/fingerprintd/FingerprintDaemonProxy.cpp
+++ b/fingerprintd/FingerprintDaemonProxy.cpp
@@ -123,7 +123,7 @@
         int32_t timeout) {
     ALOG(LOG_VERBOSE, LOG_TAG, "enroll(gid=%d, timeout=%d)\n", groupId, timeout);
     if (tokenSize != sizeof(hw_auth_token_t) ) {
-        ALOG(LOG_VERBOSE, LOG_TAG, "enroll() : invalid token size %" PRId64 "\n", tokenSize);
+        ALOG(LOG_VERBOSE, LOG_TAG, "enroll() : invalid token size %zu\n", tokenSize);
         return -1;
     }
     const hw_auth_token_t* authToken = reinterpret_cast<const hw_auth_token_t*>(token);
@@ -171,7 +171,7 @@
     char path_name[PATH_MAX];
     memcpy(path_name, path, pathlen);
     path_name[pathlen] = '\0';
-    ALOG(LOG_VERBOSE, LOG_TAG, "setActiveGroup(%d, %s, %" PRId64 ")", groupId, path_name, pathlen);
+    ALOG(LOG_VERBOSE, LOG_TAG, "setActiveGroup(%d, %s, %zu)", groupId, path_name, pathlen);
     return mDevice->set_active_group(mDevice, groupId, path_name);
     return -1;
 }