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Fix compilation on non-Windows x86-32 w/ -msse.

cpusupport.h used __cpuid() from the Windows specific header file intrin.h
which is not available under gcc. But we can use __get_cpuid() from cpuid.h
instead.

--- a/src/cpusupport.h

+++ b/src/cpusupport.h

@@ -32,7 +32,9 @@

 # if !defined(__SSE__) || defined(_M_X64) || defined(__amd64__)

 #  define query_cpu_support() 0

 #else

-# include <intrin.h>

+

+#if defined WIN32 || defined _WIN32

+#include <intrin.h>

 static inline int query_cpu_support(void)

 {

    int buffer[4];

@@ -43,5 +45,19 @@

 #  endif

        ;

 }

+#else

+#include <cpuid.h>

+static inline int query_cpu_support(void)

+{

+   unsigned int eax, ebx, ecx, edx=0;

+   __get_cpuid(1, &eax, &ebx, &ecx, &edx);

+   return ((edx & 1<<25) == 0) /*SSE*/

+#ifdef __SSE2__

+        + ((edx & 1<<26) == 0) /*SSE2*/

+#endif

+       ;

+}

+#endif

+

 # endif

 #endif