(svn r17515) -Fix [FS#3189]: [Squirrel] In some cases the call stack would not be cleaned up properly during crash handling. Occasionally this causes asserts to be triggered or crashes.

src/3rdparty/squirrel/squirrel/sqvm.cpp

@@ -1165,6 +1165,8 @@ bool SQVM::CallNative(SQNativeClosure *nclosure,SQInteger nargs,SQInteger stackb
 	}
 
 
+	/* Store the call stack size, so we can restore that */
+	SQInteger cstksize = _callsstacksize;
 	SQInteger ret;
 	try {
 		SQBool can_suspend = this->_can_suspend;
@@ -1175,6 +1177,7 @@ bool SQVM::CallNative(SQNativeClosure *nclosure,SQInteger nargs,SQInteger stackb
 		_nnativecalls--;
 		suspend = false;
 
+		_callsstacksize = cstksize;
 		_stackbase = oldstackbase;
 		_top = oldtop;
 
@@ -1184,6 +1187,8 @@ bool SQVM::CallNative(SQNativeClosure *nclosure,SQInteger nargs,SQInteger stackb
 		throw;
 	}
 
+	assert(cstksize == _callsstacksize);
+
 	_nnativecalls--;
 	suspend = false;
 	if( ret == SQ_SUSPEND_FLAG) suspend = true;