[sql] Import reference version of SQLite 3.10.2.

third_party/sqlite/sqlite-src-3100200/src/random.c

Index: third_party/sqlite/sqlite-src-3100200/src/random.c
diff --git a/third_party/sqlite/src/src/random.c b/third_party/sqlite/sqlite-src-3100200/src/random.c
similarity index 94%
copy from third_party/sqlite/src/src/random.c
copy to third_party/sqlite/sqlite-src-3100200/src/random.c
index b82566524c40c6bb87154a259d7c24077d54e394..179d01bef247d46245804d4bce88e427feedcfe5 100644
--- a/third_party/sqlite/src/src/random.c
+++ b/third_party/sqlite/sqlite-src-3100200/src/random.c
@@ -48,11 +48,19 @@ void sqlite3_randomness(int N, void *pBuf){
 #endif
 
 #if SQLITE_THREADSAFE
-  sqlite3_mutex *mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_PRNG);
-  sqlite3_mutex_enter(mutex);
+  sqlite3_mutex *mutex;
+#endif
+
+#ifndef SQLITE_OMIT_AUTOINIT
+  if( sqlite3_initialize() ) return;
 #endif
 
-  if( N<=0 ){
+#if SQLITE_THREADSAFE
+  mutex = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_PRNG);
+#endif
+
+  sqlite3_mutex_enter(mutex);
+  if( N<=0 || pBuf==0 ){
     wsdPrng.isInit = 0;
     sqlite3_mutex_leave(mutex);
     return;