Remove string splits with \r from renderer resource parsers

[heinezen]

openage/libopenage/renderer/resources/parser/common.cpp

Lines 24 to 29 in 99e355e

	if (args[2][args[2].size() - 1] == '\r') {
	texture.path = args[2].substr(1, args[2].size() - 3);
	}
	else {
	texture.path = args[2].substr(1, args[2].size() - 2);
	}

openage/libopenage/renderer/resources/parser/parse_sprite.cpp

Line 199 in 99e355e

if (line.empty() || line.substr(0, 1) == "#" || line[0] == '\r') {

openage/libopenage/renderer/resources/parser/parse_terrain.cpp

Line 204 in 99e355e

if (line.empty() || line.substr(0, 1) == "#" || line[0] == '\r') {

openage/libopenage/renderer/resources/parser/parse_texture.cpp

Line 60 in 99e355e

if (args[1][args[1].size() - 1] == '\r') {

openage/libopenage/renderer/resources/parser/parse_texture.cpp

Line 188 in 99e355e

if (line.empty() || line.substr(0, 1) == "#" || line[0] == '\r') {

This should not be handled in here, but in the string splitter code, see https://github.com/SFTtech/openage/blob/master/libopenage/util/strings.cpp

I guess we need a dedicated newline function for this that first splits at \n and then checks if the generated lines end with \r to also remove those.

Originally posted by @heinezen in #1642 (comment)