mm-core: Fix compilation issue to erratic string constant

Fix compilation issue to erratic string constant in metadata header

Change-Id: Ibd0197d46cd73ac8f4635b818d8fc9be0da1f22e
CRs-Fixed: 889710
diff --git a/mm-core/inc/QCMetaData.h b/mm-core/inc/QCMetaData.h
index 621729b..5990637 100644
--- a/mm-core/inc/QCMetaData.h
+++ b/mm-core/inc/QCMetaData.h
@@ -54,7 +54,7 @@
 
     kkeyAacFormatAdif        = 'adif',  // bool (int32_t)
     kKeyInterlace            = 'intL',  // bool (int32_t)
-    kkeyAacFormatLtp         = 'ltp',
+    kkeyAacFormatLtp         = 'ltp ',
 
 
     //DTS subtype