Revert change to P_SlopeLaunch

Don't call slopelaunch just from object z difference if the slope has no physics.

src/p_mobj.c

@@ -1938,7 +1938,9 @@ void P_XYMovement(mobj_t *mo)
 						FIXED_TO_FLOAT(AngleFixed(newangle)),
 						FIXED_TO_FLOAT(AngleFixed(oldangle-newangle))
 						);*/
-		} else if (predictedz-mo->z > abs(slopemom.z/2)) { // Now check if we were supposed to stick to this slope
+		// Sryder 2018-11-26: Don't launch here if it's a slope without physics, we stick to those like glue anyway
+		} else if (predictedz-mo->z > abs(slopemom.z/2)
+			&& !(mo->standingslope->flags & SL_NOPHYSICS)) { // Now check if we were supposed to stick to this slope
 			//CONS_Printf("%d-%d > %d\n", (predictedz), (mo->z), (slopemom.z/2));
 			P_SlopeLaunch(mo);
 		}

src/p_slopes.c

@@ -812,10 +812,10 @@ void P_SlopeLaunch(mobj_t *mo)
 		mo->momy = slopemom.y;
 		mo->momz = slopemom.z;
 #endif
+	}
 
 	//CONS_Printf("Launched off of slope.\n");
 	mo->standingslope = NULL;
-	}
 }
 
 // Function to help handle landing on slopes