Frameworks/base: Fix two warnings in cmds

Change-Id: Ifb9c7fb7a2d28c13010ddc186bea5f5f0daefb4a

cmds/backup/backup.cpp

@@ -75,7 +75,7 @@ static int perform_list(const char* filename)
                 size_t dataSize;
                 err = reader.ReadEntityHeader(&key, &dataSize);
                 if (err == 0) {
-                    printf("   entity: %s (%d bytes)\n", key.string(), dataSize);
+                    printf("   entity: %s (%zu bytes)\n", key.string(), dataSize);
                 } else {
                     printf("   Error reading entity header\n");
                 }

cmds/idmap/create.cpp

@@ -78,7 +78,7 @@ fail:
         if (fstat(idmap_fd, &st) == -1) {
             return true;
         }
-        if (st.st_size < N) {
+        if (st.st_size < static_cast<off_t>(N)) {
             // file is empty or corrupt
             return true;
         }

include/androidfw/ResourceTypes.h

@@ -1773,9 +1773,7 @@ public:
             const char* targetPath, const char* overlayPath,
             void** outData, size_t* outSize) const;
 
-    enum {
-        IDMAP_HEADER_SIZE_BYTES = 4 * sizeof(uint32_t) + 2 * 256,
-    };
+    static const size_t IDMAP_HEADER_SIZE_BYTES = 4 * sizeof(uint32_t) + 2 * 256;
 
     // Retrieve idmap meta-data.
     //