Cause gcc warning suppression in shell.c to be nice in other project(s).

FossilOrigin-Name: 6b41ba2e996ab7b9c3943ab93a19748db5cf37792f5d59d20eec301085282355

manifest

@@ -1,5 +1,5 @@
-C Update\san\sassert()\sin\sthe\sstat4\scode\sthat\sis\sonly\strue\sfor\sa\swell-formed\sdatabase.
-D 2023-02-08T14:25:00.629
+C Cause\sgcc\swarning\ssuppression\sin\sshell.c\sto\sbe\snice\sin\sother\sproject(s).
+D 2023-02-08T14:49:52.179
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -622,7 +622,7 @@ F src/random.c 606b00941a1d7dd09c381d3279a058d771f406c5213c9932bbd93d5587be4b9c
 F src/resolve.c d62c5665279cc7485f9d45b5e20911cc7b19c203f268321a90d05d74f4725750
 F src/rowset.c ba9515a922af32abe1f7d39406b9d35730ed65efab9443dc5702693b60854c92
 F src/select.c c3ce1b49cca2c66c8c88fe7d9e1f3db23590deb4dd631619ad90e1e5d21bcf1f
-F src/shell.c.in 623d793be69c1d9592447fa6e1dbabfce46758821f2b63d6cde2c8cd1d472641
+F src/shell.c.in 839d2b9f04f2b24e7032edb9ef756c34fbd60be91e24bc1ac8f1dae3a13c7742
 F src/sqlite.h.in c060f9e6f646fd817abf273c068666e079fc6e8467ea1d3e8b20f355f82722e9
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 F src/sqlite3ext.h da473ce2b3d0ae407a6300c4a164589b9a6bfdbec9462688a8593ff16f3bb6e4
@@ -2045,8 +2045,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 168fa2fb22b8c1ad80c7001a429d3a80b48acfbfebb5414a0caa76964ea647c3
-R 81e82019be06f2b1f77bebf5a224afea
-U dan
-Z ee5c3f940801bd68e725142a7015cdad
+P 04439f3b23b22a3c187637f286764568ee922227e3e34b2e63075876b4d1f2ac
+R 5a4282edd5d64747c316d95e6189a5da
+U larrybr
+Z 5a1072aa059100fdccf9abcb84e30eb9
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-04439f3b23b22a3c187637f286764568ee922227e3e34b2e63075876b4d1f2ac
+6b41ba2e996ab7b9c3943ab93a19748db5cf37792f5d59d20eec301085282355

src/shell.c.in

@@ -168,7 +168,7 @@ typedef unsigned char u8;
 
 #ifndef deliberate_fall_through
 /* Quiet some compilers about some of our intentional code. */
-# if GCC_VERSION>=7000000
+# if defined(GCC_VERSION) && GCC_VERSION>=7000000
 #  define deliberate_fall_through __attribute__((fallthrough));
 # else
 #  define deliberate_fall_through