remove compiler warning wrt. prototypes

src/frontend/logicexp.c

@@ -614,6 +614,7 @@ static void ptable_print(PTABLE pt)
 
 /* Start of logicexp parser */
 static char *get_inst_name(void);
+static char *get_temp_name(void);
 static void aerror(char *s);
 static BOOL amatch(int t);
 static BOOL bexpr(void);

src/spicelib/analysis/cktop.c

@@ -16,8 +16,6 @@ Modified: 2005 Paolo Nenzi - Restructured
 #include "ngspice/enh.h"
 #endif
 
-extern bool ft_ngdebug;
-
 static int dynamic_gmin(CKTcircuit *, long int, long int, int);
 static int spice3_gmin(CKTcircuit *, long int, long int, int);
 static int new_gmin(CKTcircuit*, long int, long int, int);