codec2: fix uninitialized member in C2PlatformStorePlguinLoader

Bug: 169331519
Test: builds
Change-Id: I64059108f867767aea387d2b6317a6f473922831
diff --git a/media/codec2/vndk/C2PlatformStorePluginLoader.cpp b/media/codec2/vndk/C2PlatformStorePluginLoader.cpp
index 4c330e5..bee028a 100644
--- a/media/codec2/vndk/C2PlatformStorePluginLoader.cpp
+++ b/media/codec2/vndk/C2PlatformStorePluginLoader.cpp
@@ -33,7 +33,8 @@
 }  // unnamed
 
 C2PlatformStorePluginLoader::C2PlatformStorePluginLoader(const char *libPath)
-    : mCreateBlockPool(nullptr) {
+    : mCreateBlockPool(nullptr),
+      mCreateAllocator(nullptr) {
     mLibHandle = dlopen(libPath, RTLD_NOW | RTLD_NODELETE);
     if (mLibHandle == nullptr) {
         ALOGD("Failed to load library: %s (%s)", libPath, dlerror());