[eigen] patched submodule for io

Author: hshose

ext/libeigen/eigen

@@ -21,7 +21,7 @@ def init(module):
 
 
 def prepare(module, options):
-    module.depends(":architecture:assert")
+    module.depends(":architecture:assert", ":io")
     return True
 
 

ext/libeigen/eigen.lb

@@ -249,12 +249,14 @@ public:
 
 	inline size_t width() const { return 0; }
 	inline void width(size_t) {}
+%% if options.with_float and options.with_printf
 	inline size_t precision() const { return fmt_precision; }
-    inline size_t precision(size_t p) {
-        size_t old = fmt_precision;
-        fmt_precision = p;
-        return old;
-    }
+	inline size_t precision(size_t p) {
+		size_t old = fmt_precision;
+		fmt_precision = p;
+		return old;
+	}
+%% endif
 	inline char fill() const { return ' '; }
     inline char fill(char) {
         return ' ';