improve stability of loadobj().

LearnOpenGL/ResourceLoader.cpp

@@ -167,6 +167,8 @@ bool openObj(const std::string fileName, std::vector<glm::vec3> &vertices, std::
 				log_warn(infoLog, fileName + " : " + "faceVertexIndices.size() : " + std::to_string(faceVertexIndicies.size()));
 			}
 
+			if (faceVertexTexCoordIndicies.size() > 0)
+			{
 				if (faceVertexTexCoordIndicies.size() == 3)
 				{
 					vertexTexCoord.push_back(vertexTexCoordIndices[faceVertexTexCoordIndicies[0]]);
@@ -188,6 +190,7 @@ bool openObj(const std::string fileName, std::vector<glm::vec3> &vertices, std::
 					GLchar infoLog[512] = { 0, };
 					log_warn(infoLog, fileName + " : " + "vertexTexCoordIndices.size() : " + std::to_string(faceVertexTexCoordIndicies.size()));
 				}
+			}
 
 			if (faceVertexNormalIndicies.size() == 3)
 			{