Core/Dependency: Upgrade G3d-library to v8.0-release (patched version!)

Note: Due to issues with G3D (normally requiring X11 and the ZIP-library),
the sourcetree version contains a modified version. The applied patch is
commited to the repository for future reference.

--HG--
branch : trunk

dep/g3dlite/include/G3D/Quat.inl

@@ -0,0 +1,36 @@
+/**
+  Quat.inl
+
+  @cite Quaternion implementation based on Watt & Watt page 363.
+  Thanks to Max McGuire for slerp optimizations.
+
+  @maintainer Morgan McGuire, [email protected]
+
+  @created 2002-01-23
+  @edited  2004-03-04
+ */
+
+namespace G3D {
+
+inline float& Quat::operator[] (int i) {
+    debugAssert(i >= 0);
+    debugAssert(i < 4);
+    return ((float*)this)[i];
+}
+
+inline const float& Quat::operator[] (int i) const {
+    debugAssert(i >= 0);
+    debugAssert(i < 4);
+    return ((float*)this)[i];
+}
+
+inline Quat Quat::operator-(const Quat& other) const {
+    return Quat(x - other.x, y - other.y, z - other.z, w - other.w);
+}
+
+inline Quat Quat::operator+(const Quat& other) const {
+    return Quat(x + other.x, y + other.y, z + other.z, w + other.w);
+}
+
+}
+