SF bug 119622: compile errors due to redundant atof decls. I don't understand

the bug report (for details, look at it), but agree there's no need for Python
to declare atof itself:  we #include stdlib.h, and ANSI C sez atof is declared
there already.

Python/compile.c

@@ -767,7 +767,6 @@ com_addopname(struct compiling *c, int op, node *n)
 static PyObject *
 parsenumber(struct compiling *co, char *s)
 {
-	extern double atof(const char *);
 	char *end;
 	long x;
 	double dx;

Python/marshal.c

@@ -403,7 +403,6 @@ r_object(RFILE *p)
 	
 	case TYPE_FLOAT:
 		{
-			extern double atof(const char *);
 			char buf[256];
 			double dx;
 			n = r_byte(p);
@@ -422,7 +421,6 @@ r_object(RFILE *p)
 #ifndef WITHOUT_COMPLEX
 	case TYPE_COMPLEX:
 		{
-			extern double atof(const char *);
 			char buf[256];
 			Py_complex c;
 			n = r_byte(p);