Added Dot to Vector3 and better shader error

-Vector3 now has Dot product function which takes another Vector3. I
will have to clean up the GSmath at some point and implement all the
useful functions at once.
-The get_uniform macro will now print the name of the uniform as well.

ENIGMAsystem/SHELL/Graphics_Systems/General/GSmath.cpp

@@ -43,6 +43,11 @@ Vector3 Vector3::Cross(const Vector3& v) const
     return Vector3(_x, _y, _z);
 }
 
+gs_scalar Vector3::Dot(const Vector3& v) const
+{
+    return x * v.x + y * v.y + z * v.z;
+}
+
 Vector3& Vector3::Normalize()
 {
     const gs_scalar Length = sqrt(x * x + y * y + z * z);

ENIGMAsystem/SHELL/Graphics_Systems/General/GSmath.h

@@ -77,6 +77,7 @@ namespace enigma
       }
 
       Vector3 Cross(const Vector3& v) const;
+      gs_scalar Dot(const Vector3& v) const;
       Vector3& Normalize();
       void Rotate(gs_scalar Angle, const Vector3& Axis);
   };

ENIGMAsystem/SHELL/Graphics_Systems/OpenGL3/GL3shader.cpp

@@ -50,7 +50,7 @@
         printf("%s - Uniform at location %i not found!\n", str, location);\
         return;\
     }else if ( uniter->second.size != usize ){\
-        printf("%s - Uniform at location %i with %i arguments is accesed by a function with %i arguments!\n", str, location, uniter->second.size, usize);\
+        printf("%s - Uniform [%s] at location %i with %i arguments is accesed by a function with %i arguments!\n", str, uniter->second.name.c_str(), location, uniter->second.size, usize);\
     }
 
   #define get_attribute(atiter,location)\