Fix a potential use of an uninitialized pointer in RTree following an OOM

error.

FossilOrigin-Name: fd4ec0cdbd84f3333dd4c7a4236491bce6b9ab21fb2c088751ca1279b31bd864

ext/rtree/rtree.c

@@ -2853,7 +2853,7 @@ static int rtreeDeleteRowid(Rtree *pRtree, sqlite3_int64 iDelete){
   int rc;                         /* Return code */
   RtreeNode *pLeaf = 0;           /* Leaf node containing record iDelete */
   int iCell;                      /* Index of iDelete cell in pLeaf */
-  RtreeNode *pRoot;               /* Root node of rtree structure */
+  RtreeNode *pRoot = 0;           /* Root node of rtree structure */
 
 
   /* Obtain a reference to the root node to initialize Rtree.iDepth */

manifest

@@ -1,5 +1,5 @@
-C Fix\sa\sbug\sin\stool/mksourceid.c:\s\nThe\smksourceid.c\sprogram\swas\sincorrectly\sincluding\sthe\s"#\sRemove\sthis\sline"\nline\sof\sthe\sFossil-generated\s"manifest"\sfile\sin\sthe\sSHA3\shash.\s\sThat\smeans\nthat\sall\sSQLITE_SOURCE_IDs\sfor\strunk\sversions\sgoing\sback\sto\ncheck-in\s[30966d56]\s(2017-08-22)\sare\sincorrect.
-D 2017-09-21T10:24:10.329
+C Fix\sa\spotential\suse\sof\san\suninitialized\spointer\sin\sRTree\sfollowing\san\sOOM\nerror.
+D 2017-09-21T13:11:47.775
 F Makefile.in 4bc36d913c2e3e2d326d588d72f618ac9788b2fd4b7efda61102611a6495c3ff
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc 6033b51b6aea702ea059f6ab2d47b1d3cef648695f787247dd4fb395fe60673f
@@ -326,7 +326,7 @@ F ext/rbu/sqlite3rbu.c a1a303de8b90f987ef63bf9cef57f5d7dd7983a9e8aed3775a759d87a
 F ext/rbu/sqlite3rbu.h b42bcd4d8357268c6c39ab2a60b29c091e89328fa8cc49c8fac5ab8d007e79b2
 F ext/rbu/test_rbu.c 7073979b9cc80912bb03599ac8d85ab5d3bf03cfacd3463f2dcdd7822997533a
 F ext/rtree/README 6315c0d73ebf0ec40dedb5aa0e942bc8b54e3761
-F ext/rtree/rtree.c cf84d52958a7ec6a506f1711e119db847ed6bb5dedde78a58e97503287afcda1
+F ext/rtree/rtree.c f2fd34db37ea053798f8e66b44a473449b21301d2b92505ee576823789e909fb
 F ext/rtree/rtree.h 834dbcb82dc85b2481cde6a07cdadfddc99e9b9e
 F ext/rtree/rtree1.test 4fdd60ae034e43f2fefc26492032d02e742e8b14d468b7c51d95a1e2fa47cf00
 F ext/rtree/rtree2.test acbb3a4ce0f4fbc2c304d2b4b784cfa161856bba
@@ -1655,7 +1655,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P f8b1c64d3eeb8413ca149f34cc00f9154a5446d06ad33bbffa69118e6110f81d
-R 64106870c2d3f0ac5e3f96924365cf0c
+P 65765222ef6f4e80c05a24994fcee145f5fbc0ad35c9fab3d75492964b3eb187
+R 02da5e87646960e2ec34004109ee9fa5
 U drh
-Z 04dce0480829a76620b41bbfd98b4888
+Z 12b5a29a0408d0f6f2c00a6a52186774

manifest.uuid

@@ -1 +1 @@
-65765222ef6f4e80c05a24994fcee145f5fbc0ad35c9fab3d75492964b3eb187
+fd4ec0cdbd84f3333dd4c7a4236491bce6b9ab21fb2c088751ca1279b31bd864