Fix: some Wstringop-truncation warnings during compile.

Changing strncpy to memcpy does the trick.

src/pager.c

@@ -656,7 +656,7 @@ char *supplemental_name;
        (note: strncpy() only terminates output string if the specified
        count is bigger than the length of the substring being copied) */
     if (!strncmp(dbase_str, "moist towel", 11))
-        (void) strncpy(dbase_str += 2, "wet", 3); /* skip "mo" replace "ist" */
+        memcpy(dbase_str += 2, "wet", 3); /* skip "mo" replace "ist" */
 
     /* Make sure the name is non-empty. */
     if (*dbase_str) {

src/pline.c

@@ -161,7 +161,7 @@ VA_DECL(const char *, line)
         /* truncate, preserving the final 3 characters:
            "___ extremely long text" -> "___ extremely l...ext"
            (this may be suboptimal if overflow is less than 3) */
-        (void) strncpy(pbuf + BUFSZ - 1 - 6, "...", 3);
+        memcpy(pbuf + BUFSZ - 1 - 6, "...", 3);
         /* avoid strncpy; buffers could overlap if excess is small */
         pbuf[BUFSZ - 1 - 3] = line[ln - 3];
         pbuf[BUFSZ - 1 - 2] = line[ln - 2];

src/write.c

@@ -158,7 +158,7 @@ register struct obj *pen;
         nm += 3;
 
     if ((bp = strstri(nm, " armour")) != 0) {
-        (void) strncpy(bp, " armor ", 7); /* won't add '\0' */
+        memcpy(bp, " armor ", 7); /* won't add '\0' */
         (void) mungspaces(bp + 1);        /* remove the extra space */
     }