Import SQLite 3.10.2.

third_party/sqlite/src/ext/misc/closure.c

Index: third_party/sqlite/src/ext/misc/closure.c
diff --git a/third_party/sqlite/src/ext/misc/closure.c b/third_party/sqlite/src/ext/misc/closure.c
index 30c812d2201cd2d08a5d1a5c3464dbdfbed52fb1..510c46ec9086b604ca8f1fb87842057687955ab2 100644
--- a/third_party/sqlite/src/ext/misc/closure.c
+++ b/third_party/sqlite/src/ext/misc/closure.c
@@ -486,10 +486,10 @@ static const char *closureValueOfKey(const char *zKey, const char *zStr){
   int i;
   if( nStr<nKey+1 ) return 0;
   if( memcmp(zStr, zKey, nKey)!=0 ) return 0;
-  for(i=nKey; isspace(zStr[i]); i++){}
+  for(i=nKey; isspace((unsigned char)zStr[i]); i++){}
   if( zStr[i]!='=' ) return 0;
   i++;
-  while( isspace(zStr[i]) ){ i++; }
+  while( isspace((unsigned char)zStr[i]) ){ i++; }
   return zStr+i;
 }