patch 9.2.0353: Missing out-of-memory check in register.c

Problem:  Missing out-of-memory check in register.c
Solution: Check for memory allocation failure and return NULL
          (John Marriott).

closes: #19949

Signed-off-by: John Marriott <basilisk@internode.on.net>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/register.c

@@ -352,6 +352,16 @@ get_register(
 	    {
 		reg->y_array[i].string = vim_strnsave(y_current->y_array[i].string,
 					    y_current->y_array[i].length);
+		if (reg->y_array[i].string == NULL)
+		{
+		    // The allocation failed so clean up and exit
+		    while (--i >= 0)
+			vim_free(reg->y_array[i].string);
+		    vim_free(reg->y_array);
+		    vim_free(reg);
+		    return (void *)NULL;
+		}
+
 		reg->y_array[i].length = y_current->y_array[i].length;
 	    }
 	}

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    353,
 /**/
     352,
 /**/