Update sqlite to 3.7.3.

third_party/sqlite/src/src/loadext.c

Index: third_party/sqlite/src/src/loadext.c
diff --git a/third_party/sqlite/src/src/loadext.c b/third_party/sqlite/src/src/loadext.c
index 1fa6aa39a1c1033d2f43fc9f0ec3dea7146e621f..835b8a84ea01bffc078bc49a07d05415665b085b 100644
--- a/third_party/sqlite/src/src/loadext.c
+++ b/third_party/sqlite/src/src/loadext.c
@@ -11,8 +11,6 @@
 *************************************************************************
 ** This file contains code used to dynamically load extensions into
 ** the SQLite library.
-**
-** $Id: loadext.c,v 1.60 2009/06/03 01:24:54 drh Exp $
 */
 
 #ifndef SQLITE_CORE
@@ -378,13 +376,11 @@ static int sqlite3LoadExtension(
   handle = sqlite3OsDlOpen(pVfs, zFile);
   if( handle==0 ){
     if( pzErrMsg ){
-      zErrmsg = sqlite3StackAllocZero(db, nMsg);
+      *pzErrMsg = zErrmsg = sqlite3_malloc(nMsg);
       if( zErrmsg ){
         sqlite3_snprintf(nMsg, zErrmsg, 
             "unable to open shared library [%s]", zFile);
         sqlite3OsDlError(pVfs, nMsg-1, zErrmsg);
-        *pzErrMsg = sqlite3DbStrDup(0, zErrmsg);
-        sqlite3StackFree(db, zErrmsg);
       }
     }
     return SQLITE_ERROR;
@@ -393,13 +389,11 @@ static int sqlite3LoadExtension(
                    sqlite3OsDlSym(pVfs, handle, zProc);
   if( xInit==0 ){
     if( pzErrMsg ){
-      zErrmsg = sqlite3StackAllocZero(db, nMsg);
+      *pzErrMsg = zErrmsg = sqlite3_malloc(nMsg);
       if( zErrmsg ){
         sqlite3_snprintf(nMsg, zErrmsg,
             "no entry point [%s] in shared library [%s]", zProc,zFile);
         sqlite3OsDlError(pVfs, nMsg-1, zErrmsg);
-        *pzErrMsg = sqlite3DbStrDup(0, zErrmsg);
-        sqlite3StackFree(db, zErrmsg);
       }
       sqlite3OsDlClose(pVfs, handle);
     }