Index: src/vdbemem.c
==================================================================
--- src/vdbemem.c
+++ src/vdbemem.c
@@ -112,11 +112,11 @@
   int rc;
 #endif
   assert( (pMem->flags&MEM_RowSet)==0 );
   assert( desiredEnc==SQLITE_UTF8 || desiredEnc==SQLITE_UTF16LE
            || desiredEnc==SQLITE_UTF16BE );
-  if( !(pMem->flags&MEM_Str) || pMem->enc==desiredEnc ){
+  if( pMem->enc==desiredEnc || !(pMem->flags&MEM_Str) ){
     return SQLITE_OK;
   }
   assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
 #ifdef SQLITE_OMIT_UTF16
   return SQLITE_ERROR;
@@ -206,10 +206,24 @@
   assert( (pMem->flags & MEM_Dyn)==0 );
   pMem->z = pMem->zMalloc;
   pMem->flags &= (MEM_Null|MEM_Int|MEM_Real);
   return SQLITE_OK;
 }
+
+/*
+** It is already known that pMem contains an unterminated string.
+** Add the zero terminator.
+*/
+static SQLITE_NOINLINE int vdbeMemAddTerminator(Mem *pMem){
+  if( sqlite3VdbeMemGrow(pMem, pMem->n+2, 1) ){
+    return SQLITE_NOMEM_BKPT;
+  }
+  pMem->z[pMem->n] = 0;
+  pMem->z[pMem->n+1] = 0;
+  pMem->flags |= MEM_Term;
+  return SQLITE_OK;
+}
 
 /*
 ** Change pMem so that its MEM_Str or MEM_Blob value is stored in
 ** MEM.zMalloc, where it can be safely written.
 **
@@ -219,16 +233,12 @@
   assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
   assert( (pMem->flags&MEM_RowSet)==0 );
   if( (pMem->flags & (MEM_Str|MEM_Blob))!=0 ){
     if( ExpandBlob(pMem) ) return SQLITE_NOMEM;
     if( pMem->szMalloc==0 || pMem->z!=pMem->zMalloc ){
-      if( sqlite3VdbeMemGrow(pMem, pMem->n + 2, 1) ){
-        return SQLITE_NOMEM_BKPT;
-      }
-      pMem->z[pMem->n] = 0;
-      pMem->z[pMem->n+1] = 0;
-      pMem->flags |= MEM_Term;
+      int rc = vdbeMemAddTerminator(pMem);
+      if( rc ) return rc;
     }
   }
   pMem->flags &= ~MEM_Ephem;
 #ifdef SQLITE_DEBUG
   pMem->pScopyFrom = 0;
@@ -263,24 +273,10 @@
   pMem->flags &= ~(MEM_Zero|MEM_Term);
   return SQLITE_OK;
 }
 #endif
 
-/*
-** It is already known that pMem contains an unterminated string.
-** Add the zero terminator.
-*/
-static SQLITE_NOINLINE int vdbeMemAddTerminator(Mem *pMem){
-  if( sqlite3VdbeMemGrow(pMem, pMem->n+2, 1) ){
-    return SQLITE_NOMEM_BKPT;
-  }
-  pMem->z[pMem->n] = 0;
-  pMem->z[pMem->n+1] = 0;
-  pMem->flags |= MEM_Term;
-  return SQLITE_OK;
-}
-
 /*
 ** Make sure the given Mem is \u0000 terminated.
 */
 int sqlite3VdbeMemNulTerminate(Mem *pMem){
   assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );