Frameworks/base: Turn on -Wall -Werror in cmds

Fix small warnings, turn on -Wall -Werror.

Change-Id: Iab1f01a7c7ebd6ba832b75067c5e395f380a1b8b
diff --git a/cmds/idmap/inspect.cpp b/cmds/idmap/inspect.cpp
index b9ac8a5..f6afc85 100644
--- a/cmds/idmap/inspect.cpp
+++ b/cmds/idmap/inspect.cpp
@@ -152,13 +152,13 @@
             printe("failed to get resource name id=0x%08x\n", res_id);
             return UNKNOWN_ERROR;
         }
-        if (package) {
+        if (package != NULL) {
             *package = String8(String16(data.package, data.packageLen));
         }
-        if (type) {
+        if (type != NULL) {
             *type = String8(String16(data.type, data.typeLen));
         }
-        if (name) {
+        if (name != NULL) {
             *name = String8(String16(data.name, data.nameLen));
         }
         return NO_ERROR;