Enhance the sqlite3AtoF() function so that it can operate with or without

long double and provides accurate results in both cases.

FossilOrigin-Name: fd987508d5589d42b46625c97cfb2feeac70fdb1cb11224610554b07a60644e6

diff --cc manifest
index b0eb0e0eabcfb39a13c71960a4f90595bb70a0f7,4bb15daf3351c263a41c4e38c738cb81e6fe49e8..09df4ada72eea4e6a1ceb77b0d933c319d9b5fef
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Store\sthe\sfp-speed-1.c\stest\sprogram\sused\sto\smeasure\srelative\sperformance\sof\nSQLite\sversus\sthe\sstandard\slibrary,\sin\sthe\stest/\sdirectory.\s\sA\sheader\scomment\nexplains\show\sto\suse\sit.
- D 2023-07-03T15:30:50.934
 -C Enhance\ssqlite3AtoF()\sso\sthat\sit\shonors\sthe\sUSELONGDOUBLE\stest-control.\nEnable\sthe\stest/atof1.test\smodule\son\snon-intel\splatforms.
 -D 2023-07-03T18:18:35.350
++C Enhance\sthe\ssqlite3AtoF()\sfunction\sso\sthat\sit\scan\soperate\swith\sor\swithout\nlong\sdouble\sand\sprovides\saccurate\sresults\sin\sboth\scases.
++D 2023-07-03T18:32:29.741
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
  F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@@ -2043,8 -2042,8 +2043,9 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
- P 6bf6018a00d61c5f0e53b37b00befaf5ad1d85323f41cf0cea25d8c6c1017096
- R ef72dab00177aafb299a3d17bab4eff5
 -P 02ae6caff1f7925c696ad263fe78b1036364d24b6373e1baec10d53aafb14a12
 -R bad32f05b3c6a0ddbf09f09fc45b76f6
++P eaff376277edceb043e9aac9d2df3e1157f576605508733be8a0a0aa4d720e1d b7850fd480535980d66f107c2746e7f7fc0a5379ec8244d84f7785533c83f276
++R 49f707099e0e46abf4a0f5d7491861bc
++T +closed b7850fd480535980d66f107c2746e7f7fc0a5379ec8244d84f7785533c83f276
  U drh
- Z b2aa398ed798c317f62bc01949c71c6b
 -Z 7edb4dd9862f63ed43ef736b26696576
++Z d70381137f6ea47ede6113f3555573c2
  # Remove this line to create a well-formed Fossil manifest.

diff --cc manifest.uuid
index 70a78872874896fe665f2d8febbdea4588cd9698,ecc3aca4fdf1276c5a7bbf06619654c130652ac8..83a3c5013b6bd3ab41f2165d9254bf88b38405b5
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- eaff376277edceb043e9aac9d2df3e1157f576605508733be8a0a0aa4d720e1d
 -b7850fd480535980d66f107c2746e7f7fc0a5379ec8244d84f7785533c83f276
++fd987508d5589d42b46625c97cfb2feeac70fdb1cb11224610554b07a60644e6