Make 1992/marangon main() return int, not void

Due to the fact that void main() will not work in some systems, of
course.

1992/marangon/Makefile

@@ -41,7 +41,8 @@ include ../../var.mk
 CSILENCE= -Wno-bitwise-op-parentheses -Wno-error -Wno-implicit-function-declaration \
 	-Wno-logical-op-parentheses -Wno-main-return-type -Wno-missing-braces \
 	-Wno-parentheses -Wno-return-type -Wno-tautological-bitwise-compare \
-	-Wno-unsequenced -Wno-deprecated-non-prototype -Wno-strict-prototypes
+	-Wno-unsequenced -Wno-deprecated-non-prototype -Wno-strict-prototypes \
+	-Wno-implicit-int
 
 # Common C compiler warning flags
 #

1992/marangon/marangon.c

@@ -48,7 +48,7 @@ I (;y<6;++y)
 I(x=0;x<6;++x)
 mvwaddch(r,X(y),Y(x),z[x][y]+'0'); Q(0);
 }
-void main()
+int main()
 {
 char *ST();
 i a=0,b=0,c,q,t,s,x,sc=0;