Merge branch 'fix-minor-spelling-mistakes' into 'next'

Fix minor spelling mistake

See merge request STJr/SRB2!2154

src/netcode/client_connection.c

@@ -572,7 +572,7 @@ static boolean CL_FinishedFileList(void)
 			CL_Reset();
 			D_StartTitle();
 			M_StartMessage(M_GetText(
-				"An error occured when trying to\n"
+				"An error occurred when trying to\n"
 				"download missing addons.\n"
 				"(This is almost always a problem\n"
 				"with the server, not your game.)\n\n"

src/netcode/gamestate.c

@@ -284,7 +284,7 @@ void Command_ResendGamestate(void)
 	netbuffer->packettype = PT_WILLRESENDGAMESTATE;
 	if (!HSendPacket(playernode[playernum], true, 0, 0))
 	{
-		CONS_Alert(CONS_ERROR, M_GetText("A problem occured, please try again.\n"));
+		CONS_Alert(CONS_ERROR, M_GetText("A problem occurred, please try again.\n"));
 		return;
 	}
 }