fix istringstream test in Engine (was reverted) + review gcc flags

cmt/requirements-lite.generic

@@ -4,7 +4,7 @@ use class *
 
 #compiler options
 #default is gcc here are the C++ compiler options
-macro cppflags " -O3  -pipe -ansi -fPIC -Wall "
+macro cppflags " -O2 -pipe -fPIC -Wall "
 
 #do we need optimzations here?
 #macro_append cppflags "-ffast-math -m64 "

src/camel/Engine.cc

@@ -104,10 +104,10 @@ Engine::get(const std::string& key)
       planck_assert(key.substr(key.size()-1,1)==")",key+": keyword not finishing with )");
       var=key.substr(0,index);
       istringstream isNum(key.substr(index+1,key.size()-index-1));
-      //isNum >> z;
-      //planck_assert(isNum.fail(),key+": Engine canot decode z value in keyword");
+      isNum >> z;
+      planck_assert(isNum.good(),key+": Engine canot decode z value in keyword");
       //SP: 5sep18 previuous lines fail (don't lnow why) so back to previous method
-      planck_assert(isNum>>z,key+": Engine canot decode z value in keyword");
+      //planck_assert(isNum>>z,key+": Engine canot decode z value in keyword");
 
 
     }