Fix harmless compiler warnings.

FossilOrigin-Name: 8a3a3486358d076c34e515ac92663a04f0c7ff10f405094cb5b6ada0d5f05cdc

manifest

@@ -1,5 +1,5 @@
-C Ensure\sthat\sa\szero-blob\sdoes\snot\scause\sin\sinvocation\sof\smemcpy()\swith\sa\nzero\slength\sand\sa\sNULL\ssource\spointer.
-D 2022-04-02T19:21:58.840
+C Fix\sharmless\scompiler\swarnings.
+D 2022-04-02T20:08:48.365
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -624,9 +624,9 @@ F src/upsert.c 8789047a8f0a601ea42fa0256d1ba3190c13746b6ba940fe2d25643a7e991937
 F src/utf.c ee39565f0843775cc2c81135751ddd93eceb91a673ea2c57f61c76f288b041a0
 F src/util.c 602fe229f32a96ceccae4f40824129669582096f7c355f53dbac156c9fecef23
 F src/vacuum.c 6c38ddc52f0619865c91dae9c441d4d48bf3040d7dc1bc5b22da1e45547ed0b3
-F src/vdbe.c 7154f67e5317d3e62a7582c0fc6922570f816f669646e135187190152619cb57
+F src/vdbe.c dbe88250144988bf8481aa5c98714cb5f0ce355213dcc4a458a3d2062ccc54c6
 F src/vdbe.h a1d0e3b934e835e73edd146f2e7c4eadb711b5c9875c18159a57483fd78e550e
-F src/vdbeInt.h 106930790a7619bc6e851be698e6e35c6b2b2e9e66c2f464d597d6b75b919679
+F src/vdbeInt.h 88c11169ac35488764e6275017610ddbaaa0e51acd260ea61638f9ccce578d7c
 F src/vdbeapi.c 5c498998c99667f16cac2519f2fa439fe46acf99a332b0caa73637fc2ab35c22
 F src/vdbeaux.c 7a9df2e5700351221a152775e05d0b4ce9aa73b0d04bcfabeb85ab2229052bac
 F src/vdbeblob.c 5e61ce31aca17db8fb60395407457a8c1c7fb471dde405e0cd675974611dcfcd
@@ -1945,8 +1945,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 4350983b37879d3280432d90fef04f5cc4be1b3110b5435123d897e31b34db8a
-R 41e1f7708441585a94d754911a9cc8e1
+P 35441eb5e1447e01f2031837a4ede705bce34f87be27912278cc730abce6cf05
+R 0de4cbf018f5e69209b41b7da65c596e
 U drh
-Z 0c7a0f0fdc1ef54b004e1c62fd235a57
+Z ddceb08a72931a4b051462e72474673d
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-35441eb5e1447e01f2031837a4ede705bce34f87be27912278cc730abce6cf05
+8a3a3486358d076c34e515ac92663a04f0c7ff10f405094cb5b6ada0d5f05cdc

src/vdbe.c

@@ -3393,7 +3393,7 @@ case OP_MakeRecord: {
         /* NULL value.  No change in zPayload */
       }else{
         u64 v;
-        u32 i, len;
+        u32 i;
         if( serial_type==7 ){
           assert( sizeof(v)==sizeof(pRec->u.r) );
           memcpy(&v, &pRec->u.r, sizeof(v));

src/vdbeInt.h

@@ -532,7 +532,12 @@ struct ValueList {
   sqlite3_value *pOut;     /* Register to hold each decoded output value */
 };
 
-const u8 sqlite3SmallTypeSizes[128];
+/* Size of content associated with serial types that fit into a
+** single-byte varint.
+*/
+#ifndef SQLITE_AMALGAMATION
+extern const u8 sqlite3SmallTypeSizes[];
+#endif
 
 /*
 ** Function prototypes