Spelling fixes

Comments only, no change to functionality

win32/include/conio.h

@@ -194,7 +194,7 @@ extern "C" {
   }
  
   /* Register sizes are different between 32/64 bit mode. So we have to do this for _WIN64 and _WIN32
-     seperatly.  */
+     separately.  */
  
 #ifdef _WIN64
   __CRT_INLINE void __writecr0(unsigned __int64 Data)

win32/include/math.h

@@ -327,7 +327,7 @@ extern "C" {
 #define isinf(x) (fpclassify(x) == FP_INFINITE)
 
   /* 7.12.3.4 */
-  /* We don't need to worry about trucation here:
+  /* We don't need to worry about truncation here:
   A NaN stays a NaN. */
 #define isnan(x) (fpclassify(x) == FP_NAN)
 

win32/include/stdint.h

@@ -178,7 +178,7 @@ typedef unsigned long long   uintmax_t;
 
 /* 7.18.4.1  Macros for minimum-width integer constants
 
-    Accoding to Douglas Gwyn <gwyn@arl.mil>:
+    According to Douglas Gwyn <gwyn@arl.mil>:
 	"This spec was changed in ISO/IEC 9899:1999 TC1; in ISO/IEC
 	9899:1999 as initially published, the expansion was required
 	to be an integer constant of precisely matching type, which

win32/include/values.h

@@ -1,4 +1,4 @@
 /*
  * TODO: Nothing here yet. Should provide UNIX compatibility constants
- * comparible to those in limits.h and float.h.
+ * comparable to those in limits.h and float.h.
  */