make: Fix parsing of empty continuation lines

tagmanager/ctags/make.c

@@ -44,7 +44,7 @@ static int nextChar (void)
 	{
 		c = fileGetc ();
 		if (c == '\n')
-			c = fileGetc ();
+			c = nextChar ();
 	}
 	return c;
 }

tests/ctags/Makefile.am

@@ -114,6 +114,7 @@ test_sources = \
 	common.f						\
 	complex-return.js				\
 	continuation.f90				\
+	continuation.mak				\
 	countall.sql					\
 	cpp_destructor.cpp				\
 	css-at-rules.css				\

tests/ctags/continuation.mak

@@ -0,0 +1,11 @@
+
+A = \
+a=b \
+ \
+b=c \
+	\
+c=d \
+\
+d=e \
+
+B = dummy

tests/ctags/continuation.mak.tags

@@ -0,0 +1,3 @@
+# format=tagmanager
+AÌ65536Ö0
+BÌ65536Ö0