Fix compiler warnings and remove unreachable code.

FossilOrigin-Name: fd5608fb20831f1f1946c8941445b7acc463a143

diff --cc manifest
index 0a40e63b8e93e9feb1041edd66e9adb2fa7e73b8,580a2a1711be9dea3628cfcf20c3a1c6d45cdcf8..29bb3f9b7a3abc28892ab7cbef1efd5c2ddaed27
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Update\sRBU\sto\savoid\srepreparing\sa\sstatement\simmediately\safter\sit\sis\sprepared.
- D 2015-08-08T15:13:08.522
 -C Fix\san\sassert()\sthat\swas\sin\sthe\swrong\sspot.
 -D 2015-08-08T23:23:33.787
++C Fix\scompiler\swarnings\sand\sremove\sunreachable\scode.
++D 2015-08-08T23:30:56.001
  F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
  F Makefile.in 2fc9ca6bf5949d415801c007ed3004a4bdb7c380
  F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@@ -1372,7 -1372,7 +1372,8 @@@ F tool/vdbe_profile.tcl 67746953071a9f8
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
- P 065765902d2774d7432b9c00ea2efed26e0aaa5e
- R 2765017da5ae3c60aa92dacb0d16c018
- U dan
- Z eb512e32ba2a4fc03cf96df6b1123d12
 -P be190fe7826d157fc5acd84210095725b059e4f6
++P 1d75a41bb2f7fcd32f9f08768517b814e452e456 962b6cd6bbc1ef82ae98cb2ddf41e7a1116e70f5
+ R 9515e6f89ec29f4ddd4e24f2f6aa441a
++T +closed 962b6cd6bbc1ef82ae98cb2ddf41e7a1116e70f5
+ U drh
 -Z b61fd59578180c6e9e4171800bfd67be
++Z 835c78eb4169c17715bf2b1e3d1fbe33

diff --cc manifest.uuid
index 14d68e9162f1a25dad88504dd449706004cf48a6,821d1b4d7137fdce5f539db1c6d0d33b424abc69..907ce0deb86aa86ace42a792096f264fb891562f
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 1d75a41bb2f7fcd32f9f08768517b814e452e456
 -962b6cd6bbc1ef82ae98cb2ddf41e7a1116e70f5
++fd5608fb20831f1f1946c8941445b7acc463a143