ICU-23054 Add missing typecasts.

Author: roubert

icu4c/source/test/cintltst/cloctst.c

@@ -2564,7 +2564,7 @@ static void TestCanonicalizationBuffer(void)
         return;
     }
 
-    if (reslen != len) {
+    if (reslen != (int32_t)len) {
         log_err("FAIL: uloc_canonicalize(%s) => \"%i\", expected \"%u\"\n",
                 name, reslen, len);
         return;

icu4c/source/tools/makeconv/gencnvex.c

@@ -502,7 +502,7 @@ generateToUTable(CnvExtData *extData, UCMTable *table,
     subLimit=UCNV_EXT_TO_U_GET_VALUE(section[0]);
     for(j=0; j<count; ++j) {
         subStart=subLimit;
-        subLimit= (j+1)<count ? UCNV_EXT_TO_U_GET_VALUE(section[j+1]) : limit;
+        subLimit= (j+1)<count ? (int32_t)UCNV_EXT_TO_U_GET_VALUE(section[j+1]) : limit;
 
         /* remove the subStart temporary value */
         section[j]&=~UCNV_EXT_TO_U_VALUE_MASK;