Fixed a compilation warning

src/Makefile

@@ -5,7 +5,7 @@ BINDIR	= $(PREFIX)/bin
 INCLUDEDIR= $(PREFIX)/include
 CC	= cc
 CFLAGSF	= -W
-CFLAGS	= -g
+CFLAGS	= -Wall -ansi -g
 RM	= rm -f
 MKDIR	= mkdir -p
 INSTALL	= install

src/c99.c

@@ -52,4 +52,5 @@ int main(int argc, char * argv[])
 			default:
 				return _usage();
 		}
+	return 0;
 }

src/project.conf

@@ -1,6 +1,6 @@
 targets=c99
 cflags_force=-W
-cflags=-g
+cflags=-Wall -ansi -g
 
 [c99]
 type=binary