Use std namespace.

I had to rename distance() (in coord.h) to distance2() because it conflicts
with the STL function to compare 2 iterators. Not a bad change given how it
returns the square of the distance anyway.
I also had to rename the message global variable (in message.cc) to buffer.

I tried to fix and improve the coding style has much as I could, but I
probably missed a few given how huge and tedious it is.

I also didn't touch crawl-gdb.py, and the stuff in prebuilt, rltiles/tool
and util/levcomp.*, because I have no clue about those.

1 files changed, 3 insertions, 3 deletions

diff --git a/crawl-ref/source/errors.cc b/crawl-ref/source/errors.cc
index 0b325ab107..b273e70d31 100644
--- a/crawl-ref/source/errors.cc
+++ b/crawl-ref/source/errors.cc
@@ -15,7 +15,7 @@ NORETURN void fail(const char *msg, ...)
 {
     va_list args;
     va_start(args, msg);
-    std::string buf = vmake_stringf(msg, args);
+    string buf = vmake_stringf(msg, args);
     va_end(args);
 
     // Do we want to call end() right on when there's no one trying catching,
@@ -27,7 +27,7 @@ NORETURN void sysfail(const char *msg, ...)
 {
     va_list args;
     va_start(args, msg);
-    std::string buf = vmake_stringf(msg, args);
+    string buf = vmake_stringf(msg, args);
     va_end(args);
 
     buf += ": ";
@@ -40,7 +40,7 @@ NORETURN void corrupted(const char *msg, ...)
 {
     va_list args;
     va_start(args, msg);
-    std::string buf = vmake_stringf(msg, args);
+    string buf = vmake_stringf(msg, args);
     va_end(args);
 
     throw corrupted_save(buf);