fix typo in error messages: "stack overflow, cannot resize stack while in a metamethod"

squirrel/sqapi.cpp

@@ -1128,7 +1128,7 @@ SQRESULT sq_reservestack(HSQUIRRELVM v,SQInteger nsize)
 {
     if (((SQUnsignedInteger)v->_top + nsize) > v->_stack.size()) {
         if(v->_nmetamethodscall) {
-            return sq_throwerror(v,_SC("cannot resize stack while in  a metamethod"));
+            return sq_throwerror(v,_SC("cannot resize stack while in a metamethod"));
         }
         v->_stack.resize(v->_stack.size() + ((v->_top + nsize) - v->_stack.size()));
     }

squirrel/sqvm.cpp

@@ -1632,7 +1632,7 @@ bool SQVM::EnterFrame(SQInteger newbase, SQInteger newtop, bool tailcall)
     _top = newtop;
     if(newtop + MIN_STACK_OVERHEAD > (SQInteger)_stack.size()) {
         if(_nmetamethodscall) {
-            Raise_Error(_SC("stack overflow, cannot resize stack while in  a metamethod"));
+            Raise_Error(_SC("stack overflow, cannot resize stack while in a metamethod"));
             return false;
         }
         _stack.resize(newtop + (MIN_STACK_OVERHEAD << 2));