Fix SIGSEGV while compiling dthelp on 64 bit systems.

Patch from Ulrich Wilkens <mail@uwilkens.de>

I have a little patch for a problem that I found when I tried to
compile dthelp on 64bit FreeBSD. It could also be a problem on other
64bit systems.  The problem is that the program context compiles but
fails running with segmentation fault.

context uses the function m_malloc() which is missing a correct
prototype sometimes. Then it's treated to return int instead of void *
. On 64bit systems this cuts off the higher 32 bits because void * is
64bit whereas int is only 32bit.

cde/programs/dthelp/parser.ccdf/htag/util/basic.h

@@ -106,3 +106,9 @@ M_WCHAR *w_strstr(
   M_WCHAR *string1, M_WCHAR *string2
 #endif
   );
+
+void *m_malloc(
+#if defined(M_PROTO)
+  int size, char *msg
+#endif
+  ) ;

cde/programs/dthelp/parser/canon1/util/basic.h

@@ -106,3 +106,9 @@ M_WCHAR *w_strstr(
   M_WCHAR *string1, M_WCHAR *string2
 #endif
   );
+
+void *m_malloc(
+#if defined(M_PROTO)
+  int size, char *msg
+#endif
+) ;

cde/programs/dthelp/parser/pass1/util/basic.h

@@ -106,3 +106,9 @@ M_WCHAR *w_strstr(
   M_WCHAR *string1, M_WCHAR *string2
 #endif
   );
+
+void *m_malloc(
+#if defined(M_PROTO)
+  int size, char *msg
+#endif
+  ) ;

cde/programs/dthelp/parser/pass2/util/basic.h

@@ -112,3 +112,9 @@ M_WCHAR *w_strstr(
   M_WCHAR *string1, M_WCHAR *string2
 #endif
   );
+
+void *m_malloc(
+#if defined(M_PROTO)
+  int size, char *msg
+#endif
+  ) ;