NFC: Fix potentially uninitialized 'port' variable.

Bug: http://b/131390872
Test: Builds with -Wconditional-uninitialized.
Change-Id: Ie699ec39307fb3b66ade8248cdbe3d6de42533a7
diff --git a/adb/client/console.cpp b/adb/client/console.cpp
index 1dbb6e2..d10f4de 100644
--- a/adb/client/console.cpp
+++ b/adb/client/console.cpp
@@ -71,7 +71,7 @@
         return -1;
     }
 
-    int port;
+    int port = -1;
     size_t emulator_count = 0;
     for (const auto& device : android::base::Split(devices, "\n")) {
         if (sscanf(device.c_str(), "emulator-%d", &port) == 1) {