Fix cppcheck errors

Error message:

src/oemcommands.cpp:587:9: error: Uninitialized variable:
hostPosition [uninitvar]

Change-Id: I52f5fb9117525707acd762392dc8ad4b357031f3
Signed-off-by: Hariharan Rangasamy <hariharanr@ami.com>
diff --git a/src/oemcommands.cpp b/src/oemcommands.cpp
index b7c14af..eddc19c 100644
--- a/src/oemcommands.cpp
+++ b/src/oemcommands.cpp
@@ -580,7 +580,7 @@
     sdbusplus::bus_t dbus(ipmid_get_sd_bus_connection());
 
     bool platform = isMultiHostPlatform();
-    size_t hostPosition;
+    size_t hostPosition = 0;
     if (platform)
         getSelectorPosition(hostPosition);