Change a integer variable in sqlite3VdbeRecordUnpack() to unsigned in order

to avoid any possibility of an integer overflow.

FossilOrigin-Name: 1b536f6fd8d58800042f130842f0586aaa357841ee0d1b690a9815c865d50826

manifest

@@ -1,5 +1,5 @@
-C Use\smemmove()\sinstead\sof\smemcpy()\sin\sa\splace\swhere\sbuffers\smight\soverlap\nif\sthe\sdatabase\sfile\sis\sbadly\scorrupted,\sto\sprevent\swarnings\nfrom\sASAN\sand\svalgrind.
-D 2019-01-24T13:36:47.895
+C Change\sa\sinteger\svariable\sin\ssqlite3VdbeRecordUnpack()\sto\sunsigned\sin\sorder\nto\savoid\sany\spossibility\sof\san\sinteger\soverflow.
+D 2019-01-24T14:16:20.388
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F Makefile.in 0e7c107ebcaff26681bc5bcf017557db85aa828d6f7fd652d748b7a78072c298
@@ -589,7 +589,7 @@ F src/vdbe.c 090d40c688b56b4602fb196a78e9d17213f381984258131c1e8f665636ca35ac
 F src/vdbe.h 712bca562eaed1c25506b9faf9680bdc75fc42e2f4a1cd518d883fa79c7a4237
 F src/vdbeInt.h a76d5eed62c76bcd8de7afd3147fac1bc40c5a870582664bcd7d071ef437c37f
 F src/vdbeapi.c 57a2d794a8833f269b878dbc24e955369bdb379af6c4e93ebc5ce1a20fa3daf4
-F src/vdbeaux.c f6cd3f538697aff71f1ef92a769feb18173eb9df80372f570d741a237ea30628
+F src/vdbeaux.c 11ded95e16dc340625d1e321430349b7d1cbcfc2bd09dda455e7a4c6c2fa102e
 F src/vdbeblob.c f5c70f973ea3a9e915d1693278a5f890dc78594300cf4d54e64f2b0917c94191
 F src/vdbemem.c fdf49ecf8e4b81cd3593b8c4c3b34c1a0cf0e21d8b2897b89ed2d3a476ad1961
 F src/vdbesort.c 90aad5a92608f2dd771c96749beabdb562c9d881131a860a7a5bccf66dc3be7f
@@ -1802,7 +1802,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 4c976f171342ba2d39779279c28f3bc088572c440922e3e4421a3bf541263360
-R 000be4db53a8c0e7cae754221c18d732
+P 65ad6c55f1ba9bc2f75afffa3adaf19f145fad7ac9a00ccce6372e9a2cc4341b
+R 044fae2f8d5b50f222adeecb83c19999
 U drh
-Z 82bc0dd19e737236a8e3e2d652801672
+Z a7a11efee3ef8017d4f6272584568b02

manifest.uuid

@@ -1 +1 @@
-65ad6c55f1ba9bc2f75afffa3adaf19f145fad7ac9a00ccce6372e9a2cc4341b
+1b536f6fd8d58800042f130842f0586aaa357841ee0d1b690a9815c865d50826

src/vdbeaux.c

@@ -3794,7 +3794,7 @@ void sqlite3VdbeRecordUnpack(
   UnpackedRecord *p      /* Populate this structure before returning. */
 ){
   const unsigned char *aKey = (const unsigned char *)pKey;
-  int d; 
+  u32 d; 
   u32 idx;                        /* Offset in aKey[] to read from */
   u16 u;                          /* Unsigned loop counter */
   u32 szHdr;