Fix harmless compiler warnings reported by MSVC.

FossilOrigin-Name: 419652c0c82980bd043584dcd2976f91dfff7b926b216d597698299850b855c0

manifest

@@ -1,5 +1,5 @@
-C Code\sand\scomment\scleanup.\s\sEverything\sshould\swork\sthe\ssame.
-D 2023-12-02T20:25:36.578
+C Fix\sharmless\scompiler\swarnings\sreported\sby\sMSVC.
+D 2023-12-02T20:37:45.416
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -688,7 +688,7 @@ F src/hash.h 3340ab6e1d13e725571d7cee6d3e3135f0779a7d8e76a9ce0a85971fa3953c51
 F src/hwtime.h f9c2dfb84dce7acf95ce6d289e46f5f9d3d1afd328e53da8f8e9008e3b3caae6
 F src/in-operator.md 10cd8f4bcd225a32518407c2fb2484089112fd71
 F src/insert.c 3f0a94082d978bbdd33c38fefea15346c6c6bffb70bc645a71dc0f1f87dd3276
-F src/json.c 5ad1a1be6199359b09bb4eca690789b77375e00f17c55697b6288f1b0fbbe8b0
+F src/json.c fc67289aebe1ab7d3ccc31ec61b0fcea1d724f23026d072c05242dcc57049edf
 F src/legacy.c d7874bc885906868cd51e6c2156698f2754f02d9eee1bae2d687323c3ca8e5aa
 F src/loadext.c 7432c944ff197046d67a1207790a1b13eec4548c85a9457eb0896bb3641dfb36
 F src/main.c 1b89f3de98d1b59fec5bac1d66d6ece21f703821b8eaa0d53d9604c35309f6f9
@@ -2145,8 +2145,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 7e3941502789c5afaf19b08112f464abf5e3cba7f92fc9290af2a0f96127ad9a
-R 9f984966a856d28c36c8f0d6d69732a4
+P c640754df0d3ffdad994745f0d0e10c8f19f424b87f6a6e6e269491a0350b950
+R cbbd74dd3f256fc8164ba32c868936ce
 U drh
-Z ea3e13091dceb571341f1dccf0e97828
+Z de70fb53fc1b64715f23def652af30f4
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-c640754df0d3ffdad994745f0d0e10c8f19f424b87f6a6e6e269491a0350b950
+419652c0c82980bd043584dcd2976f91dfff7b926b216d597698299850b855c0

src/json.c

@@ -3416,10 +3416,10 @@ static int jsonMergePatchBlob(
   u8 eTLabel;       /* Node type of the target label */
   u32 iTLabel = 0;  /* Index of the label */
   u32 nTLabel = 0;  /* Header size in bytes for the target label */
-  u32 szTLabel;     /* Size of the target label payload */
+  u32 szTLabel = 0; /* Size of the target label payload */
   u32 iTValue = 0;  /* Index of the target value */
   u32 nTValue = 0;  /* Header size of the target value */
-  u32 szTValue;     /* Payload size for the target value */
+  u32 szTValue = 0; /* Payload size for the target value */
 
   u32 iPCursor;     /* Cursor position while scanning the patch */
   u32 iPEnd;        /* First byte past the end of the patch */