tecs_plot.f is now ext. f77

tecs/myc_mem.h

@@ -25,6 +25,6 @@
 #define NEW_STR(TO,FROM) {ERR_SP(TO=malloc(strlen(FROM)+1)); strcpy(TO,FROM); }
 
 #define MALLOC(SIZE) malloc(SIZE)
-#define FREE(PTR) free(PTR)
+#define FREE(PTR) { free(PTR); PTR=NULL; }
 
 #endif /* _MEM_UTIL_H_ */