Fix floating point precision loss in renderer [part 2]

Fix floatTime using float precision instead of double using GCC.
Fix R_BindAnimatedImage to be in sync with function table.
Fix vertexDeform bulge, vertexDeform normals, noise wave function
at high level time.

Revert unnecessary float -> double conversions.

code/renderergl2/tr_backend.c

@@ -661,7 +661,7 @@ void	RB_SetGL2D (void) {
 
 	// set time for 2D shaders
 	backEnd.refdef.time = ri.Milliseconds();
-	backEnd.refdef.floatTime = (double)backEnd.refdef.time * 0.001f;
+	backEnd.refdef.floatTime = backEnd.refdef.time * 0.001;
 }