Make testgun command without argument disable test gun model

code/cgame/cg_view.c

@@ -71,6 +71,7 @@ can then be moved around
 void CG_TestModel_f (void) {
 	vec3_t		angles;
 
+	cg.testGun = qfalse;
 	memset( &cg.testModelEntity, 0, sizeof(cg.testModelEntity) );
 	if ( trap_Argc() < 2 ) {
 		return;
@@ -96,7 +97,6 @@ void CG_TestModel_f (void) {
 	angles[ROLL] = 0;
 
 	AnglesToAxis( angles, cg.testModelEntity.axis );
-	cg.testGun = qfalse;
 }
 
 /*
@@ -108,6 +108,11 @@ Replaces the current view weapon with the given model
 */
 void CG_TestGun_f (void) {
 	CG_TestModel_f();
+
+	if ( !cg.testModelEntity.hModel ) {
+		return;
+	}
+
 	cg.testGun = qtrue;
 	cg.testModelEntity.renderfx = RF_MINLIGHT | RF_DEPTHHACK | RF_FIRST_PERSON;
 }