configure.in:

  Fix typo.

configure.in

@@ -521,7 +521,7 @@ fi
 AC_SUBST(CHECK_PID)
 AC_MSG_RESULT("$CHECK_PID")
 
-# We need a ANSI C compiler
+# We need an ANSI C compiler
 AM_PROG_CC_STDC
 
 # We need an assembler, too
@@ -529,7 +529,7 @@ AM_PROG_AS
 
 if test "$am_cv_prog_cc_stdc" = "no"
 then
-  AC_MSG_ERROR([MySQL requires a ANSI C compiler (and a C++ compiler). Try gcc. See the Installation chapter in the Reference Manual.])
+  AC_MSG_ERROR([MySQL requires an ANSI C compiler (and a C++ compiler). Try gcc. See the Installation chapter in the Reference Manual.])
 fi
 
 NOINST_LDFLAGS=