fix: fix seed type in C header and example

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---

Author: impawstarlight

lib/node_modules/@stdlib/random/base/pcg32/examples/c/example.c

@@ -24,13 +24,13 @@
 
 int main( void ) {
 	int8_t status;
-	int32_t seed;
+	uint64_t seed;
 	uint64_t v;
 	int32_t i;
 	double d;
 
 	// Create a PRNG...
-	struct BasePRNGObject *obj = stdlib_base_random_pcg32_allocate( 12345 );
+	struct BasePRNGObject *obj = stdlib_base_random_pcg32_allocate( 1234 );
 	if ( obj == NULL ) {
 		fprintf( stderr, "Error allocating memory.\n" );
 		exit( 1 );
@@ -41,7 +41,7 @@ int main( void ) {
 		printf( "Unable to retrieve the PRNG seed.\n" );
 		exit( 1 );
 	}
-	printf( "seed = %d\n", seed );
+	printf( "seed = %"PRIu64"\n", seed );
 
 	printf( "name = %s\n", obj->prng->name );
 	printf( "min = %"PRIu64"\n", obj->prng->min );

lib/node_modules/@stdlib/random/base/pcg32/include/stdlib/random/base/pcg32.h

@@ -40,7 +40,7 @@ typedef struct {
 /**
 * Returns a pointer to a dynamically allocated PRNG.
 */
-struct BasePRNGObject * stdlib_base_random_pcg32_allocate( const int64_t seed );
+struct BasePRNGObject * stdlib_base_random_pcg32_allocate( const uint64_t seed );
 
 /**
 * Frees a PRNG's allocated memory.
@@ -50,7 +50,7 @@ void stdlib_base_random_pcg32_free( struct BasePRNGObject *obj );
 /**
 * Returns a PRNG seed.
 */
-int8_t stdlib_base_random_pcg32_seed( const struct BasePRNGObject *obj, int64_t *out );
+int8_t stdlib_base_random_pcg32_seed( const struct BasePRNGObject *obj, uint64_t *out );
 
 /**
 * Returns a copy of the current PRNG state.