Prevent out-of-bounds access in Text:add when an empty string is added (fixes #1372)

src/modules/graphics/Text.cpp

@@ -112,6 +112,9 @@ void Text::addTextData(const TextData &t)
 	else
 		new_commands = font->generateVerticesFormatted(t.codepoints, constantcolor, t.wrap, t.align, vertices, &text_info);
 
+	if (vertices.empty())
+		return;
+
 	if (t.use_matrix)
 		t.matrix.transformXY(&vertices[0], &vertices[0], (int) vertices.size());
 

src/scripts/boot.lua.h

@@ -27,7 +27,7 @@ const unsigned char boot_lua[] =
 
 	0x2d, 0x2d, 0x5b, 0x5b, 0x0a,
 	0x43, 0x6f, 0x70, 0x79, 0x72, 0x69, 0x67, 0x68, 0x74, 0x20, 0x28, 0x63, 0x29, 0x20, 0x32, 0x30, 0x30, 0x36, 
-	0x2d, 0x32, 0x30, 0x31, 0x37, 0x20, 0x4c, 0x4f, 0x56, 0x45, 0x20, 0x44, 0x65, 0x76, 0x65, 0x6c, 0x6f, 0x70, 
+	0x2d, 0x32, 0x30, 0x31, 0x38, 0x20, 0x4c, 0x4f, 0x56, 0x45, 0x20, 0x44, 0x65, 0x76, 0x65, 0x6c, 0x6f, 0x70, 
 	0x6d, 0x65, 0x6e, 0x74, 0x20, 0x54, 0x65, 0x61, 0x6d, 0x0a,
 	0x54, 0x68, 0x69, 0x73, 0x20, 0x73, 0x6f, 0x66, 0x74, 0x77, 0x61, 0x72, 0x65, 0x20, 0x69, 0x73, 0x20, 0x70, 
 	0x72, 0x6f, 0x76, 0x69, 0x64, 0x65, 0x64, 0x20, 0x27, 0x61, 0x73, 0x2d, 0x69, 0x73, 0x27, 0x2c, 0x20, 0x77, 

src/scripts/nogame.lua.h

@@ -27,7 +27,7 @@ const unsigned char nogame_lua[] =
 
 	0x2d, 0x2d, 0x5b, 0x5b, 0x0a,
 	0x43, 0x6f, 0x70, 0x79, 0x72, 0x69, 0x67, 0x68, 0x74, 0x20, 0x28, 0x63, 0x29, 0x20, 0x32, 0x30, 0x30, 0x36, 
-	0x2d, 0x32, 0x30, 0x31, 0x37, 0x20, 0x4c, 0x4f, 0x56, 0x45, 0x20, 0x44, 0x65, 0x76, 0x65, 0x6c, 0x6f, 0x70, 
+	0x2d, 0x32, 0x30, 0x31, 0x38, 0x20, 0x4c, 0x4f, 0x56, 0x45, 0x20, 0x44, 0x65, 0x76, 0x65, 0x6c, 0x6f, 0x70, 
 	0x6d, 0x65, 0x6e, 0x74, 0x20, 0x54, 0x65, 0x61, 0x6d, 0x0a,
 	0x54, 0x68, 0x69, 0x73, 0x20, 0x73, 0x6f, 0x66, 0x74, 0x77, 0x61, 0x72, 0x65, 0x20, 0x69, 0x73, 0x20, 0x70, 
 	0x72, 0x6f, 0x76, 0x69, 0x64, 0x65, 0x64, 0x20, 0x27, 0x61, 0x73, 0x2d, 0x69, 0x73, 0x27, 0x2c, 0x20, 0x77,