add line drawing mode (really useful for debugging) and fix crash on non-OS X in love-experiments vertex buffer branch

save-the-world.diff

diff -r 125cff058bd5 src/modules/graphics/opengl/Mesh.cpp
--- a/src/modules/graphics/opengl/Mesh.cpp	Mon Jun 02 00:22:41 2014 -0300
+++ b/src/modules/graphics/opengl/Mesh.cpp	Sat Oct 25 10:12:35 2014 -0700
@@ -581,6 +581,8 @@
 	{
 	case DRAW_MODE_FAN:
 		return GL_TRIANGLE_FAN;
+	case DRAW_MODE_LINES:
+		return GL_LINES;
 	case DRAW_MODE_STRIP:
 		return GL_TRIANGLE_STRIP;
 	case DRAW_MODE_TRIANGLES:
@@ -694,6 +696,7 @@
 StringMap<Mesh::DrawMode, Mesh::DRAW_MODE_MAX_ENUM>::Entry Mesh::drawModeEntries[] =
 {
 	{"fan", Mesh::DRAW_MODE_FAN},
+	{"lines", Mesh::DRAW_MODE_LINES},
 	{"strip", Mesh::DRAW_MODE_STRIP},
 	{"triangles", Mesh::DRAW_MODE_TRIANGLES},
 	{"points", Mesh::DRAW_MODE_POINTS},
diff -r 125cff058bd5 src/modules/graphics/opengl/Mesh.h
--- a/src/modules/graphics/opengl/Mesh.h	Mon Jun 02 00:22:41 2014 -0300
+++ b/src/modules/graphics/opengl/Mesh.h	Sat Oct 25 10:12:35 2014 -0700
@@ -55,6 +55,7 @@
 	enum DrawMode
 	{
 		DRAW_MODE_FAN,
+		DRAW_MODE_LINES,
 		DRAW_MODE_STRIP,
 		DRAW_MODE_TRIANGLES,
 		DRAW_MODE_POINTS,
diff -r 125cff058bd5 src/modules/graphics/opengl/Shader.cpp
--- a/src/modules/graphics/opengl/Shader.cpp	Mon Jun 02 00:22:41 2014 -0300
+++ b/src/modules/graphics/opengl/Shader.cpp	Sat Oct 25 10:12:35 2014 -0700
@@ -271,7 +271,9 @@
 	for (int i = 0; i < numattribs; i++)
 	{
 		GLsizei namelength = 0;
-		glGetActiveAttrib(program, (GLuint) i, 256, &namelength, nullptr, nullptr, cname);
+		GLint size = 0;
+		GLenum type = GL_INVALID_ENUM;
+		glGetActiveAttrib(program, (GLuint) i, 256, &namelength, &size, &type, cname);
 
 		std::string name = std::string(cname, (size_t) namelength);
 		GLint location = glGetAttribLocation(program, name.c_str());